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talarczykco/Postfix on macOS.md

Last active October 3, 2017 15:53
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How to get Postfix sending mail from my MacBook
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Postfix on macOS.md

Postfix on macOS

Sierra - 10.12.6

  1. Create a new app password in Gmail for Postfix (Optional - this is required only if you have 2-Step Verification enabled.)

  2. Edit /etc/postfix/sasl_passwd with your username and app password:

     smtp.gmail.com:587 [email protected]:CHANGEME

    Restrict permissions while we're here:

     sudo chmod 640 /etc/postfix/sasl_passwd

  3. Update mapping:

     sudo postmap /etc/postfix/sasl_passwd

  4. Backup Postfix main.cf and reconfigure:

     sudo cp /etc/postfix/main.cf /etc/postfix/main.cf.bak
 
 sudo postconf \
     compatibility_level=2 \
     inet_protocols=ipv4 \
     relayhost=smtp.gmail.com:587 \
     smtp_sasl_auth_enable=yes \
     smtp_sasl_mechanism_filter=plain \
     smtp_sasl_password_maps=hash:/etc/postfix/sasl_passwd \
     smtp_sasl_security_options=noanonymous \
     smtp_tls_CAfile=/etc/ssl/cert.pem \
     smtp_tls_loglevel=1 \
     smtp_tls_security_level=verify \
     smtp_use_tls=yes
     
 sudo postfix reload

    You may get a warning about Postfix not running. If you want to interact with port 25 directly, also do sudo postfix start or edit launchd scripts to always have it running. Else, it will be started upon use of system tools like mail(1) - TODO: verify and add how-to.

  5. Stream logs while testing date | mail [email protected]:

     log stream --predicate  '(process == "smtpd") || (process == "smtp")' --info

    In another window:

     date | mail [email protected]

  6. Todo

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