Run your own deliverable email server on Ubuntu with proper authentication so your mail isn't flagged as spam.
Cloud & DevOpsPDF · 8 pages· v1.0
4.6A thorough, realistic guide to running your own mail server on Ubuntu with Postfix (SMTP) and Dovecot (IMAP), configured properly so your mail actually reaches inboxes instead of spam folders. Self-hosting email has a reputation for being painful, mostly because people skip the authentication and reputation steps. This guide does not. You'll set up Postfix and Dovecot with TLS, then configure the three records that make or break deliverability — SPF, DKIM (with OpenDKIM), and DMARC — plus the reverse DNS (PTR) record that many receivers require. You'll create mailboxes, secure submission on port 587 with SASL auth, and test against real deliverability tools. The guide is honest about the hard parts: why a clean IP and correct PTR matter, why port 25 is often blocked on cheap VPS providers, and when you should genuinely consider a relay or managed provider instead. It includes a full DNS checklist and a testing procedure so you can prove your setup before trusting it. After this guide you'll have a working, authenticated mail server you can send and receive with from a normal mail client, with the records in place to land in the inbox. For people who want real control over their email and are willing to maintain it.
It can, if SPF, DKIM, DMARC, and PTR are all correct and your IP has a clean reputation. The guide configures all four and shows how to test deliverability.
Many budget hosts block outbound 25 to fight spam. The guide explains how to request an unblock and when to use an authenticated relay instead.
It's more work than a managed provider. The guide is honest about the trade-offs and includes a 'when not to self-host' section.
Yes. You connect over IMAP (Dovecot) and submit over SMTP port 587 with TLS and your mailbox credentials.
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