Linux/Mailserver/Postfix Satellite

Installation

• install postfix

apt-get install postfix

• postfix configuration (automatic during installation or "dpkg-reconfigure postfix")
  • "Satellite System"
  • "domain.de"
  • "smtp.domain.de"

Configuration

• /etc/mailname

domain.de

• /etc/postfix/main.cf

recipient_canonical_maps = hash:/etc/postfix/canonical_recipients
sender_canonical_maps = hash:/etc/postfix/canonical_senders

smtp_use_tls=yes
smtp_sasl_auth_enable = yes
smtp_sasl_security_options = noplaintext noanonymous
smtp_sasl_tls_security_options = noanonymous
smtp_sasl_password_maps = hash:/etc/postfix/sasl_password

• /etc/postfix/canonical_recipients (+canonical_senders)

root user@domain.de
postmaster user@domain.de
webmaster user@domain.de

• /etc/postfix/sasl_password

touch /etc/postfix/sasl_password
echo "smtp.domain.de username:password" > sasl_password
chmod 600 sasl_password

Restart

• reload maps

postmap /etc/postfix/canonical_recipients
postmap /etc/postfix/canonical_senders
postmap hash:/etc/postfix/sasl_password 

• restart address mapping

/etc/init.d/postfix restart