MtaOutboundStrategy

Configures outbound message delivery routing, scheduling, and TLS strategies.

This object can be configured from the WebUI under Settings › MTA › Outbound › Strategy

Fields

`connection`

Type: Expression · default: {"else":"'default'"}

An expression that returns the connection strategy to use when delivering messages to remote SMTP servers

Available variables: MtaQueueHostVariable.

`route`

Type: Expression · default: {"else":"'mx'","match":[{"if":"is_local_domain(rcpt_domain)","then":"'local'"}]}

An expression that returns the route name to use when delivering queued messages

Available variables: MtaQueueRcptVariable.

`schedule`

Type: Expression · default: {"else":"'remote'","match":[{"if":"is_local_domain(rcpt_domain)","then":"'local'"},{"if":"source == 'dsn'","then":"'dsn'"},{"if":"source == 'report'","then":"'report'"}]}

An expression that returns the scheduling strategy to use when queueing messages

Available variables: MtaQueueRcptVariable.

`tls`

Type: Expression · default: {"else":"'default'","match":[{"if":"retry_num > 0 && last_error == 'tls'","then":"'invalid-tls'"}]}

An expression that returns the TLS strategy to use when delivering messages to remote SMTP servers

Available variables: MtaQueueHostVariable.

JMAP API

The MtaOutboundStrategy singleton is available via the urn:stalwart:jmap capability.

`x:MtaOutboundStrategy/get`

This is a standard Foo/get method as defined in RFC 8620, Section 5.1.

For singletons, the ids argument should be the literal singleton (or null to return the single instance).

This method requires the sysMtaOutboundStrategyGet permission.

curl -X POST https://mail.example.com/api \
  -H 'Authorization: Bearer $TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{
      "methodCalls": [
        [
          "x:MtaOutboundStrategy/get",
          {
            "ids": [
              "singleton"
            ]
          },
          "c1"
        ]
      ],
      "using": [
        "urn:ietf:params:jmap:core",
        "urn:stalwart:jmap"
      ]
    }'

`x:MtaOutboundStrategy/set`

This is a standard Foo/set method as defined in RFC 8620, Section 5.3.

For singletons, only the update argument with id singleton is accepted; create and destroy arguments are rejected.

This method requires the sysMtaOutboundStrategyUpdate permission.

curl -X POST https://mail.example.com/api \
  -H 'Authorization: Bearer $TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{
      "methodCalls": [
        [
          "x:MtaOutboundStrategy/set",
          {
            "update": {
              "singleton": {
                "connection": {
                  "else": "'default'"
                }
              }
            }
          },
          "c1"
        ]
      ],
      "using": [
        "urn:ietf:params:jmap:core",
        "urn:stalwart:jmap"
      ]
    }'

CLI

stalwart-cli wraps the same JMAP calls. See the CLI reference for installation, authentication, and general usage.

Fetch

stalwart-cli get MtaOutboundStrategy

Update

stalwart-cli update MtaOutboundStrategy --field connection='{"else":"'\''default'\''"}'

Nested types

Expression

A conditional expression with match rules and a default value.

`match`

Type: ExpressionMatch[]

List of conditions and their corresponding results

`else`

Type: String · required

Else condition

ExpressionMatch

A single condition-result pair in an expression.

`if`

Type: String · required

If condition

`then`

Type: String · required

Then clause

Expression references

The following expression contexts are used by fields on this page:

MtaQueueHostVariable (Variables)
MtaQueueRcptVariable (Variables)