Pmta Configuration -

<domain yourdomain.com> dkim-sign yes dkim-signature dkim._domainkey.yourdomain.com </domain>

Vera leaned back. The CEO’s frantic emails had stopped. In their place was a single, quiet Delivered receipt for a forgotten password from his own account.

Artemis wasn’t just alive. It was respectable. pmta configuration

<domain *> max-message-size 25M queue-type FIFO </domain>

The most delicate surgery was the DKIM signing. Without it, their emails were anonymous, unsigned letters. She generated new 2048-bit keys, linked them to the DNS records, and told PMTA: &lt;domain yourdomain

She added the max-errors-per-hour 10 directive. If a recipient server started screaming "User unknown," PMTA would listen. It would slam the brakes after ten errors, protecting their remaining reputation. It was the difference between a polite knock and a battering ram.

The dam broke. The queue, once a frozen river, became a raging, orderly torrent. Messages flew out—receipts to accountants, password resets to panicked users, and yes, the cat trees. But now they were polite cat trees. Respectful cat trees. Cat trees that had been properly introduced, rate-limited, and cryptographically signed. Artemis wasn’t just alive

That was the first problem. FIFO. First In, First Out. That meant a single, slow, legitimate newsletter about accounting software could get stuck behind a test email with a 20MB attachment. It was a traffic jam on a one-lane bridge.