Postfix main.cf Guide
Understand the main Postfix configuration file.
GuidePostfix master.cf Guide
Create services, transports and per-service overrides.
Guidetransport_maps
Route recipient domains through selected transports or relays.
GuideSender-Dependent Default Transports
Choose transports according to envelope sender.
GuideSender-Dependent Relay Hosts
Route senders through different smart hosts.
Guidesmtp_bind_address
Bind an outbound transport to a specific source IP.
GuidePostfix Multi-IP Sending
Combine master.cf transports with sender maps.
GuideSASL Authentication
Enable secure authenticated SMTP submission.
GuideTLS for Postfix
Configure certificates and SMTP TLS policy.
GuidePostfix with Dovecot
Integrate mailbox authentication and local delivery.
GuidePostfix with OpenDKIM
Sign outbound email with DKIM.
GuidePostfix with OpenDMARC
Evaluate DMARC policy and reporting.
GuidePostfix Queue Management
Inspect, retry, hold and delete queued messages.
GuidePostfix Logging
Read SMTP, queue, TLS and SASL logs.
GuidePostscreen
Reduce abusive SMTP connections before smtpd.
GuideRelay Restrictions
Prevent open relay while allowing authenticated clients.
GuideRecipient Restrictions
Validate destinations and block unwanted mail.
GuideHeader Checks
Filter or modify messages with header patterns.
GuidePostfix Rate Limiting
Throttle destinations with dedicated transports.
GuidePostfix Troubleshooting
Resolve common startup, permission and delivery errors.
Guide