mail-conf

ARFNET mail server configuration

Domain: arf20.com (MX mail.arf20.com) (PTR, TLSA, SPF, DKIM and DMARC configured)
FQDN: mail.arf20.com
hostname: mail
mailname: arf20.com

Postfix SMTP MTA and smtpd.

With smtpd at ports 25, SMTPS submission at 465 and SMTP (STARTTLS) submission at 587.

Accepts all connections, relays mail from authenticated users, rejects unauthenticated relaying.

Dovecot IMAP daemon

IMAP at 145 and IMAPS at 993

No POP3 because POP3 sucks

Files

postfix     
|- master.cf              daemon instance specific, { smtpd, submission, submissions }
|- main.cf                program specific, { smtp, smtpd }
|- aliases                address aliases
|- protected_destinations destionations only reachable by insiders
|- insiders               insider addresses
|- update_aliases.sh      script to compile aliases, insiders and protected_destinations, load them and reload postfix
opendkim
|- opendkim.conf          opendkim config
dovecot
|- dovecot.conf           dovecot config
gnu-mailutils
|- mailutils.conf         GNU mailutils config
|- .mailrc                user specific mail options

Tested clients

Local GNU mail
Local alpine
Remote mutt
Remote thunderbird
Remote Gmail client on android (non-gmail account)