SMTP Zen is the email backbone for people who run more than one domain and just want it to work.

Connect production-grade SMTP, add unlimited domains, and follow guided SPF, DKIM, and DMARC so your password resets, invoices, and alerts land where they should.

In minutes you can create mailbox-free forwarders and smart catch-all, then debug delivery with real-time logs when something looks off. Need to move existing mail? Migrate safely with zero-downtime IMAPSync.

And when you also need real inboxes, SMTP Zen includes conventional mailboxes with a great webmail client, so you can keep everything in one place.

No Postfix babysitting. No deliverability roulette. Just calm, reliable email for developers, freelancers, agencies, and domain investors.

Docs: https://docs.smtpzen.com