Sample Powermta Configuration - File Hot

Before deploying to production, validate the config:

After editing your /etc/pmta/config file, you must verify the configuration and restart the service. pmta reload Use code with caution. If it returns "Configuration valid", you are good to go.

relay listen 127.0.0.1:2525 auth plain auth-login auth-secret /etc/pmta/auth.secret allow-mail-from *@yourmaindomain.com allow-recipient @ route-to-vmta main-sender sample powermta configuration file hot

: Allows aggressive connection thresholds ( max-smtp-out 100 ) and high hourly volumes if your domain has a strong reputation and valid DKIM alignment.

<source 0/0> log-connections no smtp-service yes always-allow-api-submission yes default-virtual-mta mta-pool </source> Before deploying to production, validate the config: After

Copy the sample, adjust the IP ranges and domains, and start testing. And always keep a backup of your working config: /etc/pmta/config.hot.working .

If you are looking to get the most out of your PowerMTA, I can help you with a few more things: for specific domains. Troubleshooting SMTP errors in the PMTA log. relay listen 127

These settings control delivery speeds to specific ISPs like Gmail or Yahoo to prevent blocking.

; Virtual MTA (vMTAs) for IP/pool separation — create two pools: warm and hot virtual-mta hot-pool

: Ensure /var/spool/pmta and /var/log/pmta/ exist and have correct permissions ( chown pmta:pmta ).