A step-by-step guide on setting up a Linux mailserver for a small crocheted octopus. Follows the process in my blog post series starting here: https://www.sidequestninja.com/blog/h...

00:00 Intro
03:31 Part 1: DNS and Postfix
05:09 Part 1.1: Postfix
18:46 Part 1.2: TLS
22:56 Part 2: Viruses and Spam
35:37 Part 3: User Accounts
54:24 Part 4: IMAP
59:27 Part 4.1: Masking your personal IP
1:02:06 Part 4.2: SASL
1:04:22 Part 5: Mail authenticity
1:05:48 Part 5.1: Reverse DNS
1:07:15 Part 5.2: SPF
1:10:12 Part 5.3: DKIM
1:18:09 Part 5.4: DMARC

CORRECTION: At 45:54 you need to install "dovecot-imapd", not "dovecot-imap" (which doesn't exist).

Links mentioned in the video:
Blog post series: https://www.sidequestninja.com/blog/h...
Let's Encrypt: https://letsencrypt.org/
Background on weak Diffie-Hellman keys: https://weakdh.org/
TLS setup checker: https://www.checktls.com/
Latest recommended Dovecot cipher suite: https://wiki.dovecot.org/SSL/DovecotC...
Reverse DNS lookup tool: https://mxtoolbox.com/
Google advice on rolling out DMARC: https://support.google.com/a/answer/2...