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Setting up email sending

  1. create a backup of your postfix config: cp /etc/postfix/main.cf /etc/postfix/main_bak.cf
  2. open /etc/postfix/main.cf
  3. add the following rows (make sure none of the rows are duplicated) 
    #mydestination = $myhostname, server.local, localhost.local, , localhost # you can comment this out
relayhost = [smtp.mail.com]:465 # replace this domain with your mail server
smtp_use_tls = yes
smtp_sasl_auth_enable = yes
smtp_sasl_security_options = noanonymous
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
smtp_tls_wrappermode = yes
smtp_tls_security_level = encrypt

# If your mail provider doesn't support ipv6, add/change this line
inet_protocols = ipv4
  4. create this file: /etc/postfix/sasl_passwd with the following content: 
    [smtp.mail.com]:465    test@mail.com:PASSWD
  5. make it only readable by your user: chmod 600 /etc/postfix/sasl_passwd
  6. then: postmap /etc/postfix/sasl_passwd
  7. install for passwd support: apt install libsasl2-modules
  8. restart postfix: systemctl restart postfix.service
  9. you can test it multiple ways: 
    echo "Test mail from postfix" | mail -s "Test Postfix" test@test.com
OR
echo "test" | /usr/bin/pvemailforward
  10. logs can be found here:
    • /var/log/mail.warn
    • /var/log/mail.info

Sources:

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