Free tool · 100% in-browser

PowerMTA config generator

Build a hardened /etc/pmta/config baseline in seconds: relaying denied by default, a trusted submission source, one virtual MTA per IP, pools, optional DKIM signing and a sane domain policy. Everything runs in your browser — copy or download, then drop it on your licensed PowerMTA server and pmta reload.

Your settings

Postmaster email HTTP monitoring port Trusted relay sources (one CIDR/IP per line — your app / MailWizz host) Sending IPs & HELO hostnames (one per line: IP hostname) Pool base name Separate transactional pool (first IP) DKIM selector (optional) DKIM domain (optional — enables signing) Default max-smtp-out Default max-msg-rate

Generated /etc/pmta/config

Back up your existing config, then place this at /etc/pmta/config and run pmta reload. Put your DKIM private key where the domain-key line points before sending.

Config generator FAQ

Is this PowerMTA config generator free and safe to use?+

Yes. It runs entirely in your browser — nothing you type is sent anywhere. It assembles a hardened /etc/pmta/config baseline from your inputs (sending IPs, trusted relay sources, DKIM, domain policy) that you copy or download and place on your own licensed PowerMTA server.

Does this include or distribute PowerMTA?+

No. This generates only a configuration file. PowerMTA itself is commercial, licensed software you obtain from Port25/Bird or an authorized reseller. autopmta is bring-your-own-license tooling — we never bundle, distribute or crack the software.

Is the generated config production-ready?+

It's a hardened, sane starting point: relaying denied by default, a trusted submission source, one virtual MTA per IP, pools, optional DKIM signing, and a default domain policy. Real production tuning comes from watching your accounting logs and adjusting per-provider throttling — start here, then refine.

How do I apply the generated config?+

Save it to /etc/pmta/config on your server (back up the existing one first), then run pmta reload to apply it without dropping the queue, and pmta show status to confirm it's healthy. Place your DKIM private key where the domain-key directive points before sending.