Mailserver-Best-Practice
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Prepare Maildirs
- mkdir -p /etc/skel/Maildir/new
- mkdir -p /etc/skel/Maildir/cur
- mkdir -p /etc/skel/Maildir/tmp
Install Postfix
- apt-get install postfix
Postfix Service Handling
- systemctl start postfix.service
- systemctl restart postfix.service
- systemctl stop postfix.service
- systemctl status postfix.service
Config of Postfix
- /etc/postfix/master.cf
- /etc/postfix/main.cf
SSL Verschlüsselung
Install letsencrypt
- Letsencrpyt Ubuntu 16.04
- crontab -e
0 */6 * * * /usr/bin/certbot renew --no-self-upgrade --pre-hook "systemctl stop postfix; systemctl stop dovecot" --post-hook "systemctl start postfix ; systemctl start dovecot"
master.cf changed
smtps inet n - y - - smtpd -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
main.cf
smtpd_tls_cert_file = /etc/letsencrypt/live/yyy.tuxmen.de/fullchain.pem smtpd_tls_key_file = /etc/letsencrypt/live/yyy.tuxmen.de/privkey.pem smtpd_tls_security_level = may smtpd_tls_received_header = yes
Sasl2 over Dovecot
- /etc/postfix/main.cf
smtpd_sasl_auth_enable = yes smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
Dovecot
Install
- apt-get install dovecot-core dovecot-imapd
Config
- /etc/dovecot/conf.d/10-ssl.conf
ssl = yes ssl_cert = </etc/letsencrypt/live/yyy.tuxmen.de/fullchain.pem ssl_key = </etc/letsencrypt/live/yyy.tuxmen.de/privkey.pem
- /etc/dovecot/conf.d/10-mail.conf
mail_location = maildir:~/Maildir
- /etc/dovecot/conf.d/10-master.conf
service auth { unix_listener auth-userdb { #mode = 0666 #user = #group = } unix_listener /var/spool/postfix/private/auth { mode = 0666 } }
Restart
- systemctl restart postfix
- systemctl restart dovecot
Tables
mydestination = $myhostname, yaphit.tuxmen.de, localhost.tuxmen.de, localhost , hash:/etc/postfix/mydestinations alias_maps = hash:/etc/aliases transport_maps = hash:/etc/postfix/transport relocated_maps = hash:/etc/postfix/relocated virtual_maps = hash:/etc/postfix/virtual sender_canonical_maps = hash:/etc/postfix/canonical