This configuration will start PowerMTA, listen on all IP addresses on port 25 for incoming mail, and allow localhost (127.0.0.1) to relay email without restrictions. The <source 0/0> block defines default settings for connections from any other IP address.
pmta reload
postmaster postmaster@example.com host-name mail.example.com powermta config file link
service pmta restart service pmtahttp restart
# Global default settings for all domains <domain *> max-msg-rate 100/h # Send no more than 100 emails per hour to any single domain max-msg-per-connection 10 # Send max 10 emails per single SMTP connection dkim-sign yes # Sign all outbound mail with DKIM dkim-identity @mydomain.com # The domain to use for signing dkim-key-file /etc/mail/dkim.key </domain> This configuration will start PowerMTA, listen on all
To understand why copy-pasting is ineffective, one must understand the complexity of the config.dat file. The configuration operates on a hierarchy of rules. At the top level are global settings, such as the smtp-listener and postmaster settings. Below that lie VirtualMTAs (VMTAs)—a critical PowerMTA feature that allows a single installation to behave as multiple distinct mail servers.
Linking a config file to a version control system (Git, Bitbucket) allows you to track changes, roll back errors, and collaborate with a team. Services like GitHub and Bitbucket are used to store /etc/pmta/config and associated files, effectively creating a between your live server and a remote repository. The configuration operates on a hierarchy of rules
<virtual-mta pmta-pool> smtp-source-host 192.0.2.10 203.0.113.20 198.51.100.30 max-msg-rate 1000/h dkim-sign yes domain-key default,example.com,/etc/pmta/example.pem </virtual-mta>
The primary PowerMTA (PMTA) configuration file is a plain-text file typically located at /etc/pmta/config on Linux systems or C:\pmta\config.dat on Windows. This file acts as the central hub for all critical settings, including your license key, hostnames, IP address mappings, and delivery rules. Common PowerMTA Configuration Directives
# Core System Settings http-mgmt-port 8080 http-access 127.0.0.1 admin log-file /var/log/pmta/pmta.log # External File Links include /etc/pmta/master-defaults.conf include /etc/pmta/vmtas.conf include /etc/pmta/routing-rules.conf Use code with caution. Step 2: The Virtual MTA Link ( /etc/pmta/vmtas.conf )
Defines individual sending IPs or pools. SMTP Users: Configures authentication for relaying. password yourpassword ``` Use code with caution. Copied to clipboard
