Powermta Configuration Guide Top __full__ Jun 2026
$ pmta status Virtual MTA 'main': Active: 45 connections Queue: 12,340 messages Rate: 23.4 msg/s
With this guide, you now possess the top configuration patterns used by enterprise deliverability engineers. Now, go land those inboxes.
$ grep "dsn=" /var/log/powermta/panic.log | cut -d' ' -f5 | sort | uniq -c 1200 dsn=2.0.0 (Success) 45 dsn=5.1.1 (Bad destination) 12 dsn=4.2.2 (Mailbox full)
Production vs. Testing.
Increase your Linux system limits ( /etc/security/limits.conf ) to allow PowerMTA to open thousands of concurrent network sockets without dropping connections.
</domain>
record-header x-envid ENVID record-header x-job JOBID log-file /var/log/pmta/acct.csv Use code with caution. Configuration Verification Checklist powermta configuration guide top
max-smtp-out 500 # For a mid-tier server (4 vCPU, 8GB RAM) # Warning: Do not exceed 2000 without kernel tuning.
iptables -A INPUT -p tcp --dport 25 -j ACCEPT iptables -A INPUT -p tcp --dport 587 -j ACCEPT
smtp-source-ip 192.0.2.10 host-name ://yourdomain.com smtp-source-ip 192.0.2.11 host-name ://yourdomain.com virtual-mta mta_marketing # Add extra marketing IPs here to load-balance traffic Use code with caution. Key Considerations $ pmta status Virtual MTA 'main': Active: 45
If you are setting this up for a specific scale or use case, let me know: What do you plan to send daily?
Before we dive into the configuration guide, let's cover some basics. PowerMTA is designed to be highly customizable and flexible, making it a popular choice for email service providers. It supports various features such as:
smtp-source-ip 192.0.2.10 host-name ://yourdomain.com smtp-source-ip 192.0.2.11 host-name ://yourdomain.com Use code with caution. Creating MTA Pools Testing
pmta --version # Check version systemctl status pmta # Verify service status pmtad --debug # Troubleshoot startup issues
PowerMTA includes a robust web-based HTTP management console and a Command Line Interface (CLI) tool. Enabling the Web Management Console
