Events

Events are specific occurrences or actions within the system that are recorded for monitoring, auditing, and troubleshooting purposes. These events can range from user authentication attempts to message delivery notifications. Stalwart emits hundreds of different events, such as "auth successful," "message delivered," and many others, each capturing a particular aspect of the server's operation.

Each event is assigned a default logging level, which indicates the importance or severity of the event. The logging levels help to categorize events, making it easier to filter and manage them based on their significance. Tracers and loggers in Stalwart use these logging levels to decide which events to record. By configuring the logging levels, administrators can control the granularity of the data collected—choosing to log only critical events, all events, or anything in between.

Stalwart supports multiple loggers and tracers, each with its own configured logging level. This flexibility allows for different aspects of the system to be monitored with varying levels of detail. For instance, a logger configured to capture detailed debugging information might run alongside another that logs only errors and critical issues.

It is important to note that Webhooks operate differently from loggers and tracers. They do not rely on logging levels. Instead, they are configured to send a predefined list of events to external systems or services. This means that Webhooks can be used to deliver specific notifications in real-time, regardless of the event's logging level, providing a flexible mechanism for integrating Stalwart with other applications and services.

Event Levels

Logging levels define the severity or importance of events that are captured and recorded. They help in filtering the events, allowing administrators and developers to focus on the most relevant information. Here's a brief explanation of each logging level:

info: This level captures general information about the system's operations. It is typically used for logging normal, successful operations and significant milestones in the application's flow.
warn: This level captures events that are not errors but may indicate potential issues or unusual situations that should be monitored. Warnings are useful for highlighting situations that could potentially lead to problems.
error: This level captures events that indicate a failure or an issue that has occurred. Errors are critical problems that typically require immediate attention, as they may affect the system's functionality or stability.
debug: This level captures detailed diagnostic information useful for developers when troubleshooting or diagnosing issues. Debug logs provide more granular details than Info logs, often including internal state information.
trace: This is the most detailed level of logging, capturing fine-grained information about the system's operations. Trace logs are useful for in-depth debugging, as they record almost everything happening within the system.
disable: This level effectively disables logging. No events are captured or recorded when this level is set. It's useful when logging is not needed or to reduce overhead in production environments where minimal logging is required.

By using these logging levels, administrators can tailor the verbosity of logs according to their needs, balancing the amount of collected data with the relevance and importance of the information. This flexibility helps in managing storage, performance, and the ease of troubleshooting and monitoring the system.

Overriding

The default severity or logging level of each event can be overridden to customize which events are captured based on specific needs. This is done by setting the tracing.level.<event_id> key in the configuration file to the desired logging level.

For example, if the default level for a particular event, such as auth.success is set to info but you want to capture it at the debug level for more detailed information, you can adjust the configuration accordingly. For example:

[tracing.level]
auth.success = "debug"

This allows for fine-tuning of the logging output, ensuring that only relevant events are recorded at the appropriate level of detail.

By overriding the default levels, you can increase the verbosity for specific events that require closer monitoring or reduce it for less critical events to save on storage and processing resources. This flexibility is particularly useful in environments where different components or services may require different levels of attention and detail in their logging.

Event Types

The following are the event types that Stalwart Mail Server captures along with their default logging levels:

Event	Description	Level
`acme.auth-completed`	ACME authentication completed	`INFO`
`acme.auth-error`	ACME authentication error	`WARN`
`acme.auth-pending`	ACME authentication pending	`INFO`
`acme.auth-start`	ACME authentication started	`INFO`
`acme.auth-too-many-attempts`	Too many ACME authentication attempts	`WARN`
`acme.auth-valid`	ACME authentication valid	`INFO`
`acme.client-missing-sni`	ACME client missing SNI	`DEBUG`
`acme.client-supplied-sni`	ACME client supplied SNI	`DEBUG`
`acme.dns-record-created`	ACME DNS record created	`INFO`
`acme.dns-record-creation-failed`	ACME DNS record creation failed	`WARN`
`acme.dns-record-deletion-failed`	ACME DNS record deletion failed	`DEBUG`
`acme.dns-record-lookup-failed`	ACME DNS record lookup failed	`DEBUG`
`acme.dns-record-not-propagated`	ACME DNS record not propagated	`DEBUG`
`acme.dns-record-propagated`	ACME DNS record propagated	`INFO`
`acme.dns-record-propagation-timeout`	ACME DNS record propagation timeout	`WARN`
`acme.error`	ACME error	`ERROR`
`acme.order-completed`	ACME order completed	`INFO`
`acme.order-invalid`	ACME order invalid	`WARN`
`acme.order-processing`	ACME order processing	`INFO`
`acme.order-ready`	ACME order ready	`INFO`
`acme.order-start`	ACME order started	`INFO`
`acme.order-valid`	ACME order valid	`INFO`
`acme.process-cert`	Processing ACME certificate	`INFO`
`acme.renew-backoff`	ACME renew backoff	`DEBUG`
`acme.tls-alpn-error`	ACME TLS ALPN error	`WARN`
`acme.tls-alpn-received`	ACME TLS ALPN received	`INFO`
`acme.token-not-found`	ACME token not found	`WARN`
`ai.api-error`	AI API error	`WARN`
`ai.llm-response`	LLM response	`TRACE`
`arc.broken-chain`	Broken ARC chain	`DEBUG`
`arc.chain-too-long`	ARC chain too long	`DEBUG`
`arc.has-header-tag`	ARC has header tag	`DEBUG`
`arc.invalid-cv`	Invalid ARC CV	`DEBUG`
`arc.invalid-instance`	Invalid ARC instance	`DEBUG`
`arc.sealer-not-found`	ARC sealer not found	`WARN`
`auth.client-registration`	OAuth Client registration	`INFO`
`auth.error`	Authentication error	`ERROR`
`auth.failed`	Authentication failed	`DEBUG`
`auth.missing-totp`	Missing TOTP for authentication	`TRACE`
`auth.success`	Authentication successful	`INFO`
`auth.token-expired`	OAuth token expired	`DEBUG`
`auth.too-many-attempts`	Too many authentication attempts	`WARN`
`cluster.decryption-error`	Failed to decrypt a gossip packet	`WARN`
`cluster.empty-packet`	Received an empty gossip packet	`WARN`
`cluster.error`	A cluster error occurred	`WARN`
`cluster.invalid-packet`	Received an invalid gossip packet	`WARN`
`cluster.one-or-more-peers-offline`	One or more peers are offline	`DEBUG`
`cluster.peer-alive`	A peer is alive	`INFO`
`cluster.peer-back-online`	A peer came back online	`INFO`
`cluster.peer-discovered`	A new peer was discovered	`INFO`
`cluster.peer-has-changes`	A peer has reported changes	`DEBUG`
`cluster.peer-leaving`	A peer is leaving the cluster	`INFO`
`cluster.peer-offline`	A peer went offline	`INFO`
`cluster.peer-suspected`	A peer is suspected to be offline	`INFO`
`cluster.peer-suspected-is-alive`	A suspected peer is actually alive	`INFO`
`config.already-up-to-date`	Configuration already up to date	`DEBUG`
`config.build-error`	Configuration build error	`ERROR`
`config.build-warning`	Configuration build warning	`WARN`
`config.default-applied`	Default configuration applied	`DEBUG`
`config.external-key-ignored`	External configuration key ignored	`DEBUG`
`config.fetch-error`	Configuration fetch error	`ERROR`
`config.import-external`	Importing external configuration	`INFO`
`config.macro-error`	Configuration macro error	`ERROR`
`config.missing-setting`	Missing configuration setting	`DEBUG`
`config.parse-error`	Configuration parse error	`ERROR`
`config.parse-warning`	Configuration parse warning	`WARN`
`config.unused-setting`	Unused configuration setting	`DEBUG`
`config.write-error`	Configuration write error	`ERROR`
`dane.authentication-failure`	DANE authentication failed	`INFO`
`dane.authentication-success`	DANE authentication successful	`INFO`
`dane.certificate-parse-error`	Error parsing certificate for DANE	`INFO`
`dane.no-certificates-found`	No certificates found for DANE	`INFO`
`dane.tlsa-record-fetch`	Fetching TLSA record	`INFO`
`dane.tlsa-record-fetch-error`	Error fetching TLSA record	`INFO`
`dane.tlsa-record-invalid`	Invalid TLSA record	`INFO`
`dane.tlsa-record-match`	TLSA record match found	`INFO`
`dane.tlsa-record-not-dnssec-signed`	TLSA record not DNSSEC signed	`INFO`
`dane.tlsa-record-not-found`	TLSA record not found	`INFO`
`delivery.attempt-end`	Delivery attempt ended	`INFO`
`delivery.attempt-start`	Delivery attempt started	`INFO`
`delivery.auth`	SMTP authentication	`DEBUG`
`delivery.auth-failed`	SMTP authentication failed	`INFO`
`delivery.completed`	Delivery completed	`INFO`
`delivery.concurrency-limit-exceeded`	Concurrency limit exceeded	`WARN`
`delivery.connect`	Connecting to remote server	`INFO`
`delivery.connect-error`	Connection error	`INFO`
`delivery.delivered`	Message delivered	`INFO`
`delivery.domain-delivery-start`	New delivery attempt for domain	`INFO`
`delivery.double-bounce`	Discarding message after double bounce	`INFO`
`delivery.dsn-perm-fail`	DSN permanent failure notification	`INFO`
`delivery.dsn-success`	DSN success notification	`INFO`
`delivery.dsn-temp-fail`	DSN temporary failure notification	`INFO`
`delivery.ehlo`	SMTP EHLO command	`DEBUG`
`delivery.ehlo-rejected`	SMTP EHLO rejected	`INFO`
`delivery.failed`	Delivery failed	`INFO`
`delivery.greeting-failed`	SMTP greeting failed	`INFO`
`delivery.implicit-tls-error`	Implicit TLS error	`INFO`
`delivery.ip-lookup`	IP address lookup	`DEBUG`
`delivery.ip-lookup-failed`	IP address lookup failed	`INFO`
`delivery.mail-from`	SMTP MAIL FROM command	`DEBUG`
`delivery.mail-from-rejected`	SMTP MAIL FROM rejected	`INFO`
`delivery.message-rejected`	Message rejected by remote server	`INFO`
`delivery.missing-outbound-hostname`	Missing outbound hostname in configuration	`WARN`
`delivery.mx-lookup`	MX record lookup	`DEBUG`
`delivery.mx-lookup-failed`	MX record lookup failed	`INFO`
`delivery.null-mx`	Null MX record found	`INFO`
`delivery.rate-limit-exceeded`	Rate limit exceeded	`WARN`
`delivery.raw-input`	Raw SMTP input received	`TRACE`
`delivery.raw-output`	Raw SMTP output sent	`TRACE`
`delivery.rcpt-to`	SMTP RCPT TO command	`DEBUG`
`delivery.rcpt-to-failed`	SMTP RCPT TO failed	`INFO`
`delivery.rcpt-to-rejected`	SMTP RCPT TO rejected	`INFO`
`delivery.start-tls`	SMTP STARTTLS command	`INFO`
`delivery.start-tls-disabled`	STARTTLS disabled	`INFO`
`delivery.start-tls-error`	STARTTLS error	`INFO`
`delivery.start-tls-unavailable`	STARTTLS unavailable	`INFO`
`dkim.fail`	DKIM verification failed	`DEBUG`
`dkim.failed-auid-match`	DKIM AUID mismatch	`DEBUG`
`dkim.failed-body-hash-match`	DKIM body hash mismatch	`DEBUG`
`dkim.failed-verification`	DKIM verification failed	`DEBUG`
`dkim.incompatible-algorithms`	Incompatible DKIM algorithms	`DEBUG`
`dkim.neutral`	DKIM verification neutral	`DEBUG`
`dkim.none`	No DKIM signature	`DEBUG`
`dkim.pass`	DKIM verification passed	`DEBUG`
`dkim.perm-error`	DKIM permanent error	`DEBUG`
`dkim.revoked-public-key`	DKIM public key revoked	`DEBUG`
`dkim.signature-expired`	DKIM signature expired	`DEBUG`
`dkim.signature-length`	DKIM signature length issue	`DEBUG`
`dkim.signer-not-found`	DKIM signer not found	`WARN`
`dkim.temp-error`	DKIM temporary error	`DEBUG`
`dkim.unsupported-algorithm`	Unsupported DKIM algorithm	`DEBUG`
`dkim.unsupported-canonicalization`	Unsupported DKIM canonicalization	`DEBUG`
`dkim.unsupported-key-type`	Unsupported DKIM key type	`DEBUG`
`dkim.unsupported-version`	Unsupported DKIM version	`DEBUG`
`dmarc.fail`	DMARC check failed	`DEBUG`
`dmarc.none`	No DMARC record	`DEBUG`
`dmarc.pass`	DMARC check passed	`DEBUG`
`dmarc.perm-error`	DMARC permanent error	`DEBUG`
`dmarc.temp-error`	DMARC temporary error	`DEBUG`
`eval.directory-not-found`	Directory not found while evaluating expression	`WARN`
`eval.error`	Expression evaluation error	`DEBUG`
`eval.result`	Expression evaluation result	`TRACE`
`eval.store-not-found`	Store not found while evaluating expression	`DEBUG`
`fts-index.blob-not-found`	Blob not found for full-text indexing	`DEBUG`
`fts-index.index`	Full-text search index done	`INFO`
`fts-index.lock-busy`	Full-text search index lock is busy	`WARN`
`fts-index.locked`	Full-text search index is locked	`DEBUG`
`fts-index.metadata-not-found`	Metadata not found for full-text indexing	`DEBUG`
`housekeeper.purge-accounts`	Purging accounts	`INFO`
`housekeeper.purge-sessions`	Purging sessions	`INFO`
`housekeeper.purge-store`	Purging store	`INFO`
`housekeeper.schedule`	Housekeeper task scheduled	`DEBUG`
`housekeeper.start`	Housekeeper process started	`INFO`
`housekeeper.stop`	Housekeeper process stopped	`INFO`
`http.connection-end`	HTTP connection ended	`DEBUG`
`http.connection-start`	HTTP connection started	`DEBUG`
`http.error`	HTTP error occurred	`DEBUG`
`http.request-body`	HTTP request body	`TRACE`
`http.request-url`	HTTP request URL	`DEBUG`
`http.response-body`	HTTP response body	`TRACE`
`http.x-forwarded-missing`	X-Forwarded-For header is missing	`WARN`
`imap.append`	IMAP APPEND command	`DEBUG`
`imap.capabilities`	IMAP CAPABILITIES command	`DEBUG`
`imap.close`	IMAP CLOSE command	`DEBUG`
`imap.connection-end`	IMAP connection ended	`DEBUG`
`imap.connection-start`	IMAP connection started	`DEBUG`
`imap.copy`	IMAP COPY command	`DEBUG`
`imap.create-mailbox`	IMAP CREATE mailbox command	`DEBUG`
`imap.delete-mailbox`	IMAP DELETE mailbox command	`DEBUG`
`imap.enable`	IMAP ENABLE command	`DEBUG`
`imap.error`	IMAP error occurred	`DEBUG`
`imap.expunge`	IMAP EXPUNGE command	`DEBUG`
`imap.fetch`	IMAP FETCH command	`DEBUG`
`imap.get-acl`	IMAP GET ACL command	`DEBUG`
`imap.id`	IMAP ID command	`DEBUG`
`imap.idle-start`	IMAP IDLE start	`DEBUG`
`imap.idle-stop`	IMAP IDLE stop	`DEBUG`
`imap.list`	IMAP LIST command	`DEBUG`
`imap.list-rights`	IMAP LISTRIGHTS command	`DEBUG`
`imap.logout`	IMAP LOGOUT command	`DEBUG`
`imap.lsub`	IMAP LSUB command	`DEBUG`
`imap.move`	IMAP MOVE command	`DEBUG`
`imap.my-rights`	IMAP MYRIGHTS command	`DEBUG`
`imap.namespace`	IMAP NAMESPACE command	`DEBUG`
`imap.noop`	IMAP NOOP command	`DEBUG`
`imap.raw-input`	Raw IMAP input received	`TRACE`
`imap.raw-output`	Raw IMAP output sent	`TRACE`
`imap.rename-mailbox`	IMAP RENAME mailbox command	`DEBUG`
`imap.search`	IMAP SEARCH command	`DEBUG`
`imap.select`	IMAP SELECT command	`DEBUG`
`imap.set-acl`	IMAP SET ACL command	`DEBUG`
`imap.sort`	IMAP SORT command	`DEBUG`
`imap.status`	IMAP STATUS command	`DEBUG`
`imap.store`	IMAP STORE command	`DEBUG`
`imap.subscribe`	IMAP SUBSCRIBE command	`DEBUG`
`imap.thread`	IMAP THREAD command	`DEBUG`
`imap.unsubscribe`	IMAP UNSUBSCRIBE command	`DEBUG`
`incoming-report.abuse-report`	Abuse report received	`INFO`
`incoming-report.arf-parse-failed`	Failed to parse ARF report	`INFO`
`incoming-report.auth-failure-report`	Authentication failure report received	`INFO`
`incoming-report.decompress-error`	Error decompressing report	`INFO`
`incoming-report.dmarc-parse-failed`	Failed to parse DMARC report	`INFO`
`incoming-report.dmarc-report`	DMARC report received	`INFO`
`incoming-report.dmarc-report-with-warnings`	DMARC report received with warnings	`WARN`
`incoming-report.fraud-report`	Fraud report received	`INFO`
`incoming-report.message-parse-failed`	Failed to parse incoming report message	`INFO`
`incoming-report.not-spam-report`	Not spam report received	`INFO`
`incoming-report.other-report`	Other type of report received	`INFO`
`incoming-report.tls-report`	TLS report received	`INFO`
`incoming-report.tls-report-with-warnings`	TLS report received with warnings	`WARN`
`incoming-report.tls-rpc-parse-failed`	Failed to parse TLS RPC report	`INFO`
`incoming-report.virus-report`	Virus report received	`INFO`
`iprev.fail`	IPREV check failed	`DEBUG`
`iprev.none`	No IPREV record	`DEBUG`
`iprev.pass`	IPREV check passed	`DEBUG`
`iprev.perm-error`	IPREV permanent error	`DEBUG`
`iprev.temp-error`	IPREV temporary error	`DEBUG`
`jmap.account-not-found`	JMAP account not found	`DEBUG`
`jmap.account-not-supported-by-method`	JMAP account not supported by method	`DEBUG`
`jmap.account-read-only`	JMAP account is read-only	`DEBUG`
`jmap.anchor-not-found`	JMAP anchor not found	`DEBUG`
`jmap.cannot-calculate-changes`	Cannot calculate JMAP changes	`DEBUG`
`jmap.forbidden`	JMAP operation forbidden	`DEBUG`
`jmap.invalid-arguments`	Invalid JMAP arguments	`DEBUG`
`jmap.invalid-result-reference`	Invalid JMAP result reference	`DEBUG`
`jmap.method-call`	JMAP method call	`DEBUG`
`jmap.not-found`	JMAP resource not found	`DEBUG`
`jmap.not-json`	JMAP request is not JSON	`DEBUG`
`jmap.not-request`	JMAP input is not a request	`DEBUG`
`jmap.request-too-large`	JMAP request too large	`DEBUG`
`jmap.state-mismatch`	JMAP state mismatch	`DEBUG`
`jmap.unknown-capability`	Unknown JMAP capability	`DEBUG`
`jmap.unknown-data-type`	Unknown JMAP data type	`DEBUG`
`jmap.unknown-method`	Unknown JMAP method	`DEBUG`
`jmap.unsupported-filter`	Unsupported JMAP filter	`DEBUG`
`jmap.unsupported-sort`	Unsupported JMAP sort	`DEBUG`
`jmap.websocket-error`	JMAP WebSocket error	`DEBUG`
`jmap.websocket-start`	JMAP WebSocket connection started	`DEBUG`
`jmap.websocket-stop`	JMAP WebSocket connection stopped	`DEBUG`
`limit.blob-quota`	Blob quota limit reached	`DEBUG`
`limit.calls-in`	Incoming calls limit reached	`DEBUG`
`limit.concurrent-connection`	Concurrent connection limit reached	`WARN`
`limit.concurrent-request`	Concurrent request limit reached	`DEBUG`
`limit.concurrent-upload`	Concurrent upload limit reached	`DEBUG`
`limit.quota`	Quota limit reached	`DEBUG`
`limit.size-request`	Request size limit reached	`DEBUG`
`limit.size-upload`	Upload size limit reached	`DEBUG`
`limit.tenant-quota`	Tenant quota limit reached	`INFO`
`limit.too-many-requests`	Too many requests	`WARN`
`mail-auth.base64`	Base64 error during mail authentication	`DEBUG`
`mail-auth.crypto`	Crypto error during mail authentication	`DEBUG`
`mail-auth.dns-error`	DNS error	`DEBUG`
`mail-auth.dns-invalid-record-type`	Invalid DNS record type	`DEBUG`
`mail-auth.dns-record-not-found`	DNS record not found	`DEBUG`
`mail-auth.io`	I/O error during mail authentication	`DEBUG`
`mail-auth.missing-parameters`	Missing mail authentication parameters	`DEBUG`
`mail-auth.no-headers-found`	No headers found in message	`DEBUG`
`mail-auth.parse-error`	Mail authentication parse error	`DEBUG`
`mail-auth.policy-not-aligned`	Policy not aligned	`DEBUG`
`manage-sieve.capabilities`	ManageSieve CAPABILITIES command	`DEBUG`
`manage-sieve.check-script`	ManageSieve CHECK script command	`DEBUG`
`manage-sieve.connection-end`	ManageSieve connection ended	`DEBUG`
`manage-sieve.connection-start`	ManageSieve connection started	`DEBUG`
`manage-sieve.create-script`	ManageSieve CREATE script command	`DEBUG`
`manage-sieve.delete-script`	ManageSieve DELETE script command	`DEBUG`
`manage-sieve.error`	ManageSieve error occurred	`DEBUG`
`manage-sieve.get-script`	ManageSieve GET script command	`DEBUG`
`manage-sieve.have-space`	ManageSieve HAVESPACE command	`DEBUG`
`manage-sieve.list-scripts`	ManageSieve LIST scripts command	`DEBUG`
`manage-sieve.logout`	ManageSieve LOGOUT command	`DEBUG`
`manage-sieve.noop`	ManageSieve NOOP command	`DEBUG`
`manage-sieve.raw-input`	Raw ManageSieve input received	`TRACE`
`manage-sieve.raw-output`	Raw ManageSieve output sent	`TRACE`
`manage-sieve.rename-script`	ManageSieve RENAME script command	`DEBUG`
`manage-sieve.set-active`	ManageSieve SET ACTIVE command	`DEBUG`
`manage-sieve.start-tls`	ManageSieve STARTTLS command	`DEBUG`
`manage-sieve.unauthenticate`	ManageSieve UNAUTHENTICATE command	`DEBUG`
`manage-sieve.update-script`	ManageSieve UPDATE script command	`DEBUG`
`manage.already-exists`	Managed resource already exists	`DEBUG`
`manage.assert-failed`	Management assertion failed	`DEBUG`
`manage.error`	Management error	`DEBUG`
`manage.missing-parameter`	Missing management parameter	`DEBUG`
`manage.not-found`	Managed resource not found	`DEBUG`
`manage.not-supported`	Management operation not supported	`DEBUG`
`message-ingest.duplicate`	Skipping duplicate message	`INFO`
`message-ingest.error`	Message ingestion error	`ERROR`
`message-ingest.ham`	Message ingested	`INFO`
`message-ingest.imap-append`	Message appended via IMAP	`INFO`
`message-ingest.jmap-append`	Message appended via JMAP	`INFO`
`message-ingest.spam`	Possible spam message ingested	`INFO`
`milter.action-accept`	Milter action: Accept	`INFO`
`milter.action-connection-failure`	Milter action: Connection failure	`INFO`
`milter.action-discard`	Milter action: Discard	`INFO`
`milter.action-reject`	Milter action: Reject	`INFO`
`milter.action-reply-code`	Milter action: Reply code	`INFO`
`milter.action-shutdown`	Milter action: Shutdown	`INFO`
`milter.action-temp-fail`	Milter action: Temporary failure	`INFO`
`milter.disconnected`	Milter disconnected	`WARN`
`milter.frame-invalid`	Invalid Milter frame	`WARN`
`milter.frame-too-large`	Milter frame too large	`WARN`
`milter.io-error`	Milter I/O error	`WARN`
`milter.parse-error`	Milter parse error	`WARN`
`milter.read`	Reading from Milter	`TRACE`
`milter.timeout`	Milter timeout	`WARN`
`milter.tls-invalid-name`	Invalid TLS name for Milter	`WARN`
`milter.unexpected-response`	Unexpected Milter response	`WARN`
`milter.write`	Writing to Milter	`TRACE`
`mta-hook.action-accept`	MTA hook action: Accept	`INFO`
`mta-hook.action-discard`	MTA hook action: Discard	`INFO`
`mta-hook.action-quarantine`	MTA hook action: Quarantine	`INFO`
`mta-hook.action-reject`	MTA hook action: Reject	`INFO`
`mta-hook.error`	MTA hook error	`WARN`
`mta-sts.authorized`	Host authorized by MTA-STS policy	`INFO`
`mta-sts.invalid-policy`	Invalid MTA-STS policy	`INFO`
`mta-sts.not-authorized`	Host not authorized by MTA-STS policy	`INFO`
`mta-sts.policy-fetch`	Fetched MTA-STS policy	`INFO`
`mta-sts.policy-fetch-error`	Error fetching MTA-STS policy	`INFO`
`mta-sts.policy-not-found`	MTA-STS policy not found	`INFO`
`network.accept-error`	Network accept error	`DEBUG`
`network.bind-error`	Network bind error	`ERROR`
`network.closed`	Network connection closed	`TRACE`
`network.flush-error`	Network flush error	`TRACE`
`network.listen-error`	Network listener error	`ERROR`
`network.listen-start`	Network listener started	`INFO`
`network.listen-stop`	Network listener stopped	`INFO`
`network.proxy-error`	Proxy protocol error	`WARN`
`network.read-error`	Network read error	`TRACE`
`network.set-opt-error`	Network set option error	`ERROR`
`network.split-error`	Network split error	`ERROR`
`network.timeout`	Network timeout	`DEBUG`
`network.write-error`	Network write error	`TRACE`
`outgoing-report.dkim-rate-limited`	DKIM report rate limited	`INFO`
`outgoing-report.dkim-report`	DKIM report sent	`INFO`
`outgoing-report.dmarc-aggregate-report`	DMARC aggregate report sent	`INFO`
`outgoing-report.dmarc-rate-limited`	DMARC report rate limited	`INFO`
`outgoing-report.dmarc-report`	DMARC report sent	`INFO`
`outgoing-report.http-submission`	Report submitted via HTTP	`INFO`
`outgoing-report.lock-busy`	Report lock is busy	`INFO`
`outgoing-report.lock-deleted`	Report lock was deleted	`INFO`
`outgoing-report.locked`	Report is locked	`INFO`
`outgoing-report.no-recipients-found`	No recipients found for report	`INFO`
`outgoing-report.not-found`	Report not found	`INFO`
`outgoing-report.reporting-address-validation-error`	Error validating reporting address	`INFO`
`outgoing-report.spf-rate-limited`	SPF report rate limited	`INFO`
`outgoing-report.spf-report`	SPF report sent	`INFO`
`outgoing-report.submission-error`	Error submitting report	`INFO`
`outgoing-report.tls-aggregate`	TLS aggregate report sent	`INFO`
`outgoing-report.unauthorized-reporting-address`	Unauthorized reporting address	`INFO`
`pop3.capabilities`	POP3 CAPABILITIES command	`DEBUG`
`pop3.connection-end`	POP3 connection ended	`DEBUG`
`pop3.connection-start`	POP3 connection started	`DEBUG`
`pop3.delete`	POP3 DELETE command	`DEBUG`
`pop3.error`	POP3 error occurred	`DEBUG`
`pop3.fetch`	POP3 FETCH command	`DEBUG`
`pop3.list`	POP3 LIST command	`DEBUG`
`pop3.list-message`	POP3 LIST specific message command	`DEBUG`
`pop3.noop`	POP3 NOOP command	`DEBUG`
`pop3.quit`	POP3 QUIT command	`DEBUG`
`pop3.raw-input`	Raw POP3 input received	`TRACE`
`pop3.raw-output`	Raw POP3 output sent	`TRACE`
`pop3.reset`	POP3 RESET command	`DEBUG`
`pop3.start-tls`	POP3 STARTTLS command	`DEBUG`
`pop3.stat`	POP3 STAT command	`DEBUG`
`pop3.uidl`	POP3 UIDL command	`DEBUG`
`pop3.uidl-message`	POP3 UIDL specific message command	`DEBUG`
`pop3.utf8`	POP3 UTF8 command	`DEBUG`
`purge.auto-expunge`	Auto-expunge executed	`DEBUG`
`purge.error`	Purge error	`ERROR`
`purge.finished`	Purge finished	`DEBUG`
`purge.purge-active`	Active purge in progress	`DEBUG`
`purge.running`	Purge running	`INFO`
`purge.started`	Purge started	`DEBUG`
`purge.tombstone-cleanup`	Tombstone cleanup executed	`DEBUG`
`push-subscription.error`	Push subscription error	`DEBUG`
`push-subscription.not-found`	Push subscription not found	`DEBUG`
`push-subscription.success`	Push subscription successful	`TRACE`
`queue.blob-not-found`	Message blob not found	`DEBUG`
`queue.concurrency-limit-exceeded`	Concurrency limit exceeded	`INFO`
`queue.lock-busy`	Queue lock is busy	`DEBUG`
`queue.locked`	Queue is locked	`DEBUG`
`queue.queue-autogenerated`	Queued autogenerated message for delivery	`INFO`
`queue.queue-dsn`	Queued DSN for delivery	`INFO`
`queue.queue-message`	Queued message for delivery	`INFO`
`queue.queue-message-authenticated`	Queued message submission for delivery	`INFO`
`queue.queue-report`	Queued report for delivery	`INFO`
`queue.quota-exceeded`	Quota exceeded	`INFO`
`queue.rate-limit-exceeded`	Rate limit exceeded	`INFO`
`queue.rescheduled`	Message rescheduled for delivery	`INFO`
`resource.bad-parameters`	Bad resource parameters	`ERROR`
`resource.download-external`	Downloading external resource	`INFO`
`resource.error`	Resource error	`ERROR`
`resource.not-found`	Resource not found	`DEBUG`
`resource.webadmin-unpacked`	Webadmin resource unpacked	`INFO`
`security.abuse-ban`	Banned due to abuse	`INFO`
`security.authentication-ban`	Banned due to authentication errors	`INFO`
`security.ip-blocked`	Blocked IP address	`INFO`
`security.loiter-ban`	Banned due to loitering	`INFO`
`security.scan-ban`	Banned due to scan	`INFO`
`security.unauthorized`	Unauthorized access	`INFO`
`server.licensing`	Server licensing event	`INFO`
`server.shutdown`	Shutting down Stalwart Mail Server v0.10.3	`INFO`
`server.startup`	Starting Stalwart Mail Server v0.10.3	`INFO`
`server.startup-error`	Server startup error	`ERROR`
`server.thread-error`	Server thread error	`ERROR`
`sieve.action-accept`	Sieve action: Accept	`DEBUG`
`sieve.action-accept-replace`	Sieve action: Accept and replace	`DEBUG`
`sieve.action-discard`	Sieve action: Discard	`DEBUG`
`sieve.action-reject`	Sieve action: Reject	`DEBUG`
`sieve.list-not-found`	Sieve list not found	`WARN`
`sieve.message-too-large`	Sieve message too large	`WARN`
`sieve.not-supported`	Sieve action not supported	`WARN`
`sieve.quota-exceeded`	Sieve quota exceeded	`WARN`
`sieve.runtime-error`	Sieve runtime error	`DEBUG`
`sieve.script-not-found`	Sieve script not found	`WARN`
`sieve.send-message`	Sieve sending message	`INFO`
`sieve.unexpected-error`	Unexpected Sieve error	`ERROR`
`smtp.already-authenticated`	Already authenticated	`DEBUG`
`smtp.arc-fail`	ARC verification failed	`INFO`
`smtp.arc-pass`	ARC verification passed	`INFO`
`smtp.auth-exchange-too-long`	Auth exchange too long	`DEBUG`
`smtp.auth-mechanism-not-supported`	Auth mechanism not supported	`INFO`
`smtp.auth-not-allowed`	Authentication not allowed	`INFO`
`smtp.command-not-implemented`	Command not implemented	`DEBUG`
`smtp.concurrency-limit-exceeded`	Concurrency limit exceeded	`INFO`
`smtp.connection-end`	SMTP connection ended	`DEBUG`
`smtp.connection-start`	SMTP connection started	`DEBUG`
`smtp.deliver-by-disabled`	DELIVERBY extension disabled	`DEBUG`
`smtp.deliver-by-invalid`	Invalid DELIVERBY parameter	`DEBUG`
`smtp.did-not-say-ehlo`	Client did not say EHLO	`DEBUG`
`smtp.dkim-fail`	DKIM verification failed	`INFO`
`smtp.dkim-pass`	DKIM verification passed	`INFO`
`smtp.dmarc-fail`	DMARC check failed	`INFO`
`smtp.dmarc-pass`	DMARC check passed	`INFO`
`smtp.dsn-disabled`	DSN extension disabled	`DEBUG`
`smtp.ehlo`	SMTP EHLO command	`INFO`
`smtp.ehlo-expected`	EHLO command expected	`DEBUG`
`smtp.error`	SMTP error occurred	`DEBUG`
`smtp.expn`	SMTP EXPN command	`INFO`
`smtp.expn-disabled`	EXPN command disabled	`INFO`
`smtp.expn-not-found`	EXPN address not found	`INFO`
`smtp.future-release-disabled`	FUTURE RELEASE extension disabled	`DEBUG`
`smtp.future-release-invalid`	Invalid FUTURE RELEASE parameter	`DEBUG`
`smtp.help`	SMTP HELP command	`DEBUG`
`smtp.invalid-command`	Invalid command	`DEBUG`
`smtp.invalid-ehlo`	Invalid EHLO command	`INFO`
`smtp.invalid-parameter`	Invalid parameter	`DEBUG`
`smtp.invalid-recipient-address`	Invalid recipient address	`DEBUG`
`smtp.invalid-sender-address`	Invalid sender address	`DEBUG`
`smtp.iprev-fail`	IPREV check failed	`INFO`
`smtp.iprev-pass`	IPREV check passed	`INFO`
`smtp.lhlo-expected`	LHLO command expected	`DEBUG`
`smtp.loop-detected`	Mail loop detected	`INFO`
`smtp.mail-from`	SMTP MAIL FROM command	`INFO`
`smtp.mail-from-missing`	MAIL FROM address missing	`DEBUG`
`smtp.mail-from-not-allowed`	MAIL FROM not allowed	`DEBUG`
`smtp.mail-from-rewritten`	MAIL FROM address rewritten	`DEBUG`
`smtp.mail-from-unauthenticated`	MAIL FROM without authentication	`DEBUG`
`smtp.mail-from-unauthorized`	MAIL FROM unauthorized	`DEBUG`
`smtp.mailbox-does-not-exist`	Mailbox does not exist	`INFO`
`smtp.message-parse-failed`	Message parsing failed	`INFO`
`smtp.message-too-large`	Message too large	`INFO`
`smtp.missing-auth-directory`	Missing auth directory	`INFO`
`smtp.missing-local-hostname`	Missing local hostname	`WARN`
`smtp.mt-priority-disabled`	MT-PRIORITY extension disabled	`DEBUG`
`smtp.mt-priority-invalid`	Invalid MT-PRIORITY parameter	`DEBUG`
`smtp.multiple-mail-from`	Multiple MAIL FROM commands	`DEBUG`
`smtp.noop`	SMTP NOOP command	`DEBUG`
`smtp.pipe-error`	Pipe command failed	`DEBUG`
`smtp.pipe-success`	Pipe command succeeded	`DEBUG`
`smtp.quit`	SMTP QUIT command	`DEBUG`
`smtp.rate-limit-exceeded`	Rate limit exceeded	`INFO`
`smtp.raw-input`	Raw SMTP input received	`TRACE`
`smtp.raw-output`	Raw SMTP output sent	`TRACE`
`smtp.rcpt-to`	SMTP RCPT TO command	`INFO`
`smtp.rcpt-to-duplicate`	Duplicate RCPT TO	`DEBUG`
`smtp.rcpt-to-missing`	RCPT TO address missing	`DEBUG`
`smtp.rcpt-to-rewritten`	RCPT TO address rewritten	`DEBUG`
`smtp.relay-not-allowed`	Relay not allowed	`INFO`
`smtp.remote-id-not-found`	Remote host ID not found	`WARN`
`smtp.request-too-large`	Request too large	`INFO`
`smtp.require-tls-disabled`	REQUIRETLS extension disabled	`DEBUG`
`smtp.rset`	SMTP RSET command	`DEBUG`
`smtp.spf-ehlo-fail`	SPF EHLO check failed	`INFO`
`smtp.spf-ehlo-pass`	SPF EHLO check passed	`INFO`
`smtp.spf-from-fail`	SPF From check failed	`INFO`
`smtp.spf-from-pass`	SPF From check passed	`INFO`
`smtp.start-tls`	SMTP STARTTLS command	`DEBUG`
`smtp.start-tls-already`	TLS already active	`DEBUG`
`smtp.start-tls-unavailable`	STARTTLS unavailable	`DEBUG`
`smtp.syntax-error`	Syntax error	`DEBUG`
`smtp.time-limit-exceeded`	Time limit exceeded	`INFO`
`smtp.too-many-invalid-rcpt`	Too many invalid recipients	`INFO`
`smtp.too-many-messages`	Too many messages	`INFO`
`smtp.too-many-recipients`	Too many recipients	`INFO`
`smtp.transfer-limit-exceeded`	Transfer limit exceeded	`INFO`
`smtp.unsupported-parameter`	Unsupported parameter	`DEBUG`
`smtp.vrfy`	SMTP VRFY command	`INFO`
`smtp.vrfy-disabled`	VRFY command disabled	`INFO`
`smtp.vrfy-not-found`	VRFY address not found	`INFO`
`spam.classify`	Classifying message for spam	`DEBUG`
`spam.classify-error`	Error classifying message for spam	`WARN`
`spam.list-updated`	Spam list updated	`INFO`
`spam.not-enough-training-data`	Not enough training data for spam filter	`DEBUG`
`spam.pyzor-error`	Pyzor error	`WARN`
`spam.train`	Training spam filter	`DEBUG`
`spam.train-balance`	Balancing spam filter training data	`DEBUG`
`spam.train-error`	Error training spam filter	`WARN`
`spf.fail`	SPF check failed	`DEBUG`
`spf.neutral`	SPF neutral result	`DEBUG`
`spf.none`	No SPF record	`DEBUG`
`spf.pass`	SPF check passed	`DEBUG`
`spf.perm-error`	SPF permanent error	`DEBUG`
`spf.soft-fail`	SPF soft fail	`DEBUG`
`spf.temp-error`	SPF temporary error	`DEBUG`
`store.assert-value-failed`	Another process modified the record	`ERROR`
`store.blob-delete`	Blob delete operation	`TRACE`
`store.blob-missing-marker`	Blob missing marker	`WARN`
`store.blob-read`	Blob read operation	`TRACE`
`store.blob-write`	Blob write operation	`TRACE`
`store.crypto-error`	Store crypto error	`ERROR`
`store.data-corruption`	Data corruption detected	`ERROR`
`store.data-iterate`	Data store iteration operation	`TRACE`
`store.data-write`	Write batch operation	`TRACE`
`store.decompress-error`	Decompression error	`ERROR`
`store.deserialize-error`	Deserialization error	`ERROR`
`store.elasticsearch-error`	ElasticSearch error	`ERROR`
`store.filesystem-error`	Filesystem error	`ERROR`
`store.foundationdb-error`	FoundationDB error	`ERROR`
`store.ldap-bind`	LDAP bind operation	`TRACE`
`store.ldap-error`	LDAP error	`ERROR`
`store.ldap-query`	LDAP query executed	`TRACE`
`store.mysql-error`	MySQL error	`ERROR`
`store.not-configured`	Store not configured	`ERROR`
`store.not-found`	Record not found in database	`DEBUG`
`store.not-supported`	Operation not supported by store	`ERROR`
`store.pool-error`	Connection pool error	`ERROR`
`store.postgresql-error`	PostgreSQL error	`ERROR`
`store.redis-error`	Redis error	`ERROR`
`store.rocksdb-error`	RocksDB error	`ERROR`
`store.s3-error`	S3 error	`ERROR`
`store.sql-query`	SQL query executed	`TRACE`
`store.sqlite-error`	SQLite error	`ERROR`
`store.unexpected-error`	Unexpected store error	`ERROR`
`telemetry.alert`	Alert triggered	`WARN`
`telemetry.journal-error`	Journal collector error	`WARN`
`telemetry.log-error`	Log collector error	`WARN`
`telemetry.otel-exporter-error`	OpenTelemetry exporter error	`WARN`
`telemetry.otel-metrics-exporter-error`	OpenTelemetry metrics exporter error	`WARN`
`telemetry.prometheus-exporter-error`	Prometheus exporter error	`WARN`
`telemetry.webhook-error`	Webhook collector error	`WARN`
`tls-rpt.record-fetch`	Fetched TLS-RPT record	`INFO`
`tls-rpt.record-fetch-error`	Error fetching TLS-RPT record	`INFO`
`tls.certificate-not-found`	TLS certificate not found	`DEBUG`
`tls.handshake`	TLS handshake	`INFO`
`tls.handshake-error`	TLS handshake error	`DEBUG`
`tls.multiple-certificates-available`	Multiple TLS certificates available	`WARN`
`tls.no-certificates-available`	No TLS certificates available	`WARN`
`tls.not-configured`	TLS not configured	`ERROR`

Key Types

Each event log or trace entry can contain a set of key-value pairs. The following key types are supported:

accountId: Unique identifier for an account
attempt: Number of attempts made for an operation
blobId: Unique identifier for a binary large object (BLOB)
causedBy: Reason or cause of an event or error
changeId: Identifier for a specific change or modification
code: Error code or status code
collection: Name or identifier of a data collection
contents: Contents or payload of a message or object
date: Date of an event or operation
details: Additional details or information about an event
dkimFail: Indicator of a failed DKIM (DomainKeys Identified Mail) check
dkimNone: Indicator of no DKIM signature present
dkimPass: Indicator of a passed DKIM check
dmarcNone: Indicator of no DMARC (Domain-based Message Authentication, Reporting & Conformance) policy
dmarcPass: Indicator of a passed DMARC check
dmarcQuarantine: Indicator of DMARC quarantine policy
dmarcReject: Indicator of DMARC reject policy
documentId: Unique identifier for a document
domain: Domain name associated with an event or entity
due: Due date or deadline
elapsed: Elapsed time since a specific point
expected: Expected value or outcome
expires: Expiration date or time
from: Source or sender of a message or action
hamLearns: Number of ham (non-spam) messages learned
hostname: Name of a host or server
id: Generic identifier
interval: Time interval between events or operations
key: Key value in a key-value pair
limit: Upper or lower bound of a value or operation
listenerId: Identifier for a listener process
localIp: Local IP address
localPort: Local port number
mailboxId: Unique identifier for a mailbox
messageId: Unique identifier for a message
name: Name of an entity or object
nextDsn: Next Delivery Status Notification
nextRenewal: Date or time of next renewal
nextRetry: Time of next retry attempt
oldName: Previous name of an entity or object
parameters: Parameters or arguments for an operation
path: File path or URL path
policy: Policy name or identifier
protocol: Communication protocol used
queueId: Identifier for a message queue
rangeFrom: Start of a range
rangeTo: End of a range
reason: Reason for an action or outcome
remoteIp: Remote IP address
remotePort: Remote port number
renewal: Renewal date or information
reportId: Identifier for a report
result: Outcome or result of an operation
size: Size of an object or data
spfFail: Indicator of a failed SPF (Sender Policy Framework) check
spfNone: Indicator of no SPF record present
spfPass: Indicator of a passed SPF check
status: Current status of an entity or operation
strict: Indicator of strict mode or enforcement
tls: TLS (Transport Layer Security) version or status
to: Destination or recipient of a message or action
total: Total count or sum
totalFailures: Total number of failures
totalSuccesses: Total number of successes
type: Type or category of an entity or event
uid: Unique identifier
uidNext: Next available unique identifier
uidValidity: Validity token for unique identifiers
url: Uniform Resource Locator
used: Amount or quantity used
validFrom: Start date of validity period
validTo: End date of validity period
value: Value of a property or measurement
version: Version number or identifier

Events

Event Levels​

Overriding​

Event Types​

Key Types​

Event Levels

Overriding

Event Types

Key Types