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krmnn/ macOS: send mail over relay via built-in postfix.md

Last active April 9, 2021 20:35
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Make MacOS send mail over relay via built-in postfix
Raw
macOS: send mail over relay via built-in postfix.md

Make MacOS send mail over relay via built-in postfix

tested with MacOS 10.12.4

  1. Make additions to the end of /etc/postfix/main.cf, see below.
  2. Create /etc/postfix/smtp_sasl_passwords and smtp_generic, see below.
  3. Secure file permissions: chmod 0640 /etc/postfix/smtp_sasl_passwords
  4. Update hashmaps: cd /etc/postfix && postmap smtp_sasl_passwords && postmap smtp_generic
  5. Reload postfix configuration: postfix reload

Test:

% date | mail -s "the date" [email protected]

% date | sendmail -f user@relayhost [email protected]

Raw
main.cf
relayhost = $relayhost:$port
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/smtp_sasl_passwords
smtp_sasl_security_options = noanonymous
smtp_use_tls=yes
smtp_sasl_mechanism_filter = plain
smtp_tls_security_level = encrypt
smtp_tls_loglevel = 2
smtp_generic_maps = hash:/etc/postfix/smtp_generic
Raw
smtp_generic
user@localhost user@relayhost
Raw
smtp_sasl_passwords
$relayhost:$port $user@$relayhost:$password
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