Deliver macOS system mail

Deliver macOS system mail with the following instructions. These instructions apply to macOS Catalina.

Why would you want to do this?

You have cron jobs running on your system, and you want to receive emails when they fail
You want to send an email when certain things happen on your system through Automator or other means

Instructions

Edit the /etc/postfix/sasl_passwd file

sudu vi /etc/postfix/sasl_passwd

Add this line of text

[smtp.gmail.com]:587 <Your Email Id>@gmail.com:<Your Password>

Run this command

sudo postmap /etc/postfix/sasl_passwd

Edit the sudo vi /etc/postfix/main.cf file

sudo vi /etc/postfix/main.cf

Check that none of these settings are defined in the file then add these settings to the bottom of the file.

# Gmail SMTP relay
relayhost = [smtp.gmail.com]:587

# Enable SASL authentication in the Postfix SMTP client.
smtpd_sasl_auth_enable = yes
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options =
smtp_sasl_mechanism_filter = AUTH LOGIN

# Enable Transport Layer Security (TLS), i.e. SSL.
smtp_use_tls = yes
smtp_tls_security_level = encrypt
tls_random_source = dev:/dev/urandom

Test delivery of mail from your system

date | mail -s "Test Email" <Your Email Id>@gmail.com

If you don’t receive an email you can run this command before the previous command to debug the problem.

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

Why would you want to do this?#

Instructions#

Why would you want to do this?

Instructions