Skip to content

Platform
Solutions
- Managed e-mail
- Migration
Editions
Install
Overview
Settings
Support
- Overview
- Support Portal
Company

Get Stalwart

Platform

Mail Server
Collaboration
MTA
Anti-spam
Architecture
Integrations

Solutions

Managed e-mail
Migration

Editions

Enterprise
Community
Compare
Pricing
Evaluate

Documentation

Overview

Get started
Configuration
Management
Development
FAQ

Install

Linux / macOS
Windows
Docker

Support

Overview
Support Portal

Company

About
Blog
Contact
Legal

Contact Get Stalwart

Stalwart Blog
Getting started
Configuration
- Overview
- Bootstrap mode
- Recovery mode
- Environment variables
- Declarative deployments
- Expressions
  - Overview
  - Operators
  - Functions
  - Lookup lists
    
    Overview
    Local lists
    Remote lists
  - Values
- Variables
- Object encoding
Server settings
- System settings
- Listeners
- TLS
  - Overview
  - Certificates
  - ACME
    
    Overview
    Challenge types
    Configuration
- Reverse Proxy
- Auto-ban
- ASN and GeoIP
- DNS
- Autoconfiguration
- Setting up clients
- AI models
- Object metadata
- Enterprise edition
Storage settings
Access Control
- Overview
- Accounts
- Authentication
- Authorization
- OAuth and OpenID Connect
- Directories
- SCIM Provisioning
  - Overview
  - Provisioning models
  - Configuration
  - Endpoints and protocol support
  - Attribute mapping
  - Identity providers
    
    Overview
    Microsoft Entra ID
    Okta
    Keycloak
Domains
HTTP settings
- Overview
- HTTP server
- Access control
- JMAP
- WebDAV
  - Overview
  - Limits
- Form submission
- HTTP API
Email settings
- Overview
- Settings
- Management
  - Mailing lists
  - Masked email
MTA settings
- Overview
- Inbound
- Outbound
- Filtering
- Rewriting
- Sender authentication
  - DKIM
    
    DKIM overview
    Signing
    Verifying
    DKIM2
  - SPF
  - ARC
  - DMARC
  - Reverse DNS
- Transport security
- Reports
- Queue and report management
Collaboration settings
Encryption settings
Spam & Phishing filter
- Overview
- Settings
- Statistical classifier
- AI classifier
  - AI classifier
  - Enabling the AI classifier
- Rules
- DNS blocklists
- Phishing protection
- Collaborative digests
- Trusted senders
- Greylisting
- Spam traps
Sieve scripting
Clustering & HA
- Overview
- Deployment
- Configuration
- Coordination
- Orchestration
Telemetry
- Overview
- Events
- Tracing & Logging
- Metrics
- Webhooks
- Alerts
- Live telemetry
- History
- Management
Performance tuning
Management
- Overview
- Applications
  - Overview
  - Updates
- Tasks & Actions
- Web-based Administration
- Command Line Interface
- Maintenance
- Troubleshooting
Migration
- Overview
- Upgrading from Stalwart 0.16
- Migration Guide
  - Overview
  - Preparation
  - Configuring the new deployment
  - Configuring the proxy
  - Configuring the source server
    
    Overview
    Previous Stalwart versions
    Dovecot and Postfix
  - Starting the proxy
  - Migrating accounts
  - Finalizing the migration
  - Hosted services
  - Troubleshooting
- Migration proxy
  - Overview
  - Installation
  - Configuration
  - Destinations
  - Listeners
  - Mappings
    
    Overview
  - Routing
    
    Overview
    Mail protocols
    SMTP and submission
    HTTP
  - Management
    
    Overview
    Observability
    Cache invalidation
    Management API
    Troubleshooting
  - Examples
    
    Migrating from Dovecot
    Migrating between Stalwart servers
    Cluster routing
- Vandelay (import and export)
Development
Schema reference
FAQ

GitHub RSS

Stalwart Blog

Select theme

On this page

Overview

Sender authentication

DKIM

SPF

ARC

DMARC

Reverse DNS

Edit page

Last updated: Oct 26, 2026