: Crucial for protecting your sender reputation.
Using a single, massive configuration file can become difficult to manage. PowerMTA allows you to clean up your workspace by using the include directive to link external configuration files. How to Use the Include Directive to Link Config Files
You can configure PowerMTA to read all .conf files from a directory (commonly /etc/pmta/conf.d/ ). This allows you to break down your configuration into smaller, organized files (e.g., sources.conf , virtual-mtas.conf , domains.conf ), which can be scripted, version-controlled, and managed independently.
# listener <smtp-listener> port 2525 interface 0.0.0.0 allow-auth plain login </smtp-listener> powermta config file link
PowerMTA’s main configuration file (commonly named pmta.conf) defines domains, IPs, delivery rules, logging, bounce handling, rate limits, DKIM/SPF, TLS, and other MTA behavior.
If an included file has an error, pmta reload will fail and log the specific file path and line number in /var/log/pmta/httpd-access.log or syslog .
To link an external file, use the include keyword followed by the absolute path to the target file: : Crucial for protecting your sender reputation
A step-by-step tutorial on installing and configuring PMTA on CentOS. Read on Medium Security Setup
# Link 1: Define the VMTA <vmta gmail-vip> # Link 2: Link this VMTA to a specific IP source 203.0.113.5 # Link 3: Link to Gmail's specific config max-smtp-out 100 </vmta>
By default, PowerMTA reads its global settings from a centralized configuration file located at /etc/pmta/config on Linux systems. This file acts as the brain of your Mail Transfer Agent (MTA). It instructs PowerMTA on which ports to listen to, how much memory to allocate, and where to write delivery logs. How to Use the Include Directive to Link
# --- Global Default Domain Rules --- max-smtp-out 20 # Max parallel connections globally per domain max-msg-per-connection 100 # Recycle connections after 100 emails retry-interval 30m # Retry deferred mail every 30 minutes # --- ISP-Specific Adjustments --- # Gmail Traffic Rules max-smtp-out 50 max-msg-per-connection 500 smtp-4xx-expiry 2d # Drop dead mail faster to save queue space # Yahoo / AOL Traffic Rules max-smtp-out 30 max-msg-per-connection 40 backoff-to-normal-after 1h Use code with caution. 5. Validation and Deployment Workflow
What (CentOS, Ubuntu, etc.) are you running?