What is Email Wiki?
Email Wiki is a free, open knowledge base dedicated to email server technology. Our focus is practical, code-first content covering the full self-hosted email stack — from installing and configuring Postfix and Dovecot to mastering SPF, DKIM, DMARC, and inbox deliverability.
We cover the technologies that power the internet's email infrastructure: Postfix, Dovecot, Exim, Sendmail, OpenDKIM, SpamAssassin, Rspamd, and more.
What You'll Find Here
- Postfix — MTA configuration, relay setup, virtual domains, SASL, TLS
- Dovecot — IMAP/POP3 setup, Maildir, virtual users, Sieve filtering
- Email authentication — SPF, DKIM, DMARC, BIMI
- Deliverability — blacklist removal, spam score diagnosis, bounce analysis
- Security — TLS hardening, port 25 security, rate limiting, fail2ban
- Complete mail server guides — end-to-end production setups
Who Is This For?
Email Wiki is for system administrators, DevOps engineers, and developers who run or want to run their own mail infrastructure. Whether you're setting up your first Postfix instance or debugging a stubborn DKIM failure in production, you'll find accurate, up-to-date guidance here.
Affiliate Disclosure
Some links on this site are affiliate links to VPS providers. If you purchase a VPS through one of our links, we may earn a commission at no extra cost to you. This helps us keep the site free and up to date. All tutorial content is written independently — we only recommend infrastructure we consider reliable for self-hosted email.
Trademark Notice
Email Wiki is an independent technical tutorial site. Postfix, Dovecot, Exim, Sendmail, SpamAssassin, and all other product names mentioned on this site are trademarks of their respective owners. Email Wiki is not affiliated with, endorsed by, or associated with any of these projects or their maintainers.
Contact
Have a suggestion for a tutorial? Found an error or outdated information? Email us at contact@email.wiki.