The <acct‑file> directive writes delivery events (successes, failures, bounces) to a CSV file that an external processor can consume. A minimal accounting file configuration:
Run the installation command (e.g., rpm -ivh PowerMTA-5.X.X.rpm ). Services: Start and enable the service: systemctl enable pmta systemctl start pmta Use code with caution. Copied to clipboard 3. Essential Configuration Directives The main configuration file is located at /etc/pmta/config . Authentication Setup Mandatory for inbox delivery in 2026: SPF: v=spf1 a mx ip4:YOUR_IP ~all .
Securing your SMTP ports prevents malicious actors and spammers from hijacking your server to relay emails. powermta configuration guide top
These are mandatory for modern inbox delivery. You must generate a DKIM key in PMTA and add the corresponding public key to your DNS.
Major inbox providers like Gmail and Yahoo enforce strict authentication requirements. PowerMTA can sign your outbound messages with DomainKeys Identified Mail (DKIM) automatically. Copied to clipboard 3
Configuring PowerMTA (PMTA) correctly is essential for achieving high deliverability and maintaining a strong sender reputation. As of April 2026, professional setups emphasize robust authentication, intelligent rate limiting, and virtualized sending pools. 1. Core Configuration & Licensing
PowerMTA categorizes bounces automatically into internal codes (e.g., Code 10 for "bad mailbox", Code 20 for "mailbox full"). Accounting and Log Configuration Securing your SMTP ports prevents malicious actors and
The wildcard entry ( * ) acts as a catch‑all, drastically reducing duplication.
