log-file /var/log/pmta/log acct-file /var/log/pmta/acct.csv # Delivery accounting (critical for tracking) dsn-file /var/log/pmta/dsn.csv # Bounce processing

If you are deploying a new IP address, you must strictly limit daily volumes and gradually scale them up over 30 days. Use PowerMTA’s roll-over limits to automate this safety measure.

PowerMTA handles DKIM signing natively. You need to generate a public/private key pair, add the public key to your DNS records, and point PowerMTA to the private key.