Using GMail as a relay with Postfix
I fiddled a bit with this, so I thought I'd do a no-nonsense guide to
doing this. There are other guides, but a lot of them are incomplete and
will leave you with queueing issues or annoyances.
The science bit:
smtp_use_tls = yes
smtp_sasl_auth_enable=yes
smtp_sasl_password_maps=hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options=noanonymous
smtp_sasl_tls_security_options=noanonymous
# Send all mail through smtp.gmail.com
relayhost = smtp.gmail.com
# Stop getting a catpcha, hopefully.
smtp_destination_rate_delay = 60
relay_destination_rate_delay = 60
Then, edit /etc/postfix/sasl_passwd:
smtp.gmail.com myemail@gmail.com:MyPaSsWoRd
It doesn't have to be an @gmail account,
it can be a GAFYD account, once you've logged into it once to activate
it.
Then just generate the map file for the
sasl_passwd file and reload. As root:
postmap sasl_passwd
postfix reload
And you're done. Monitor your queue a few
times over the first few days to make sure stupid stuff hasn't happened
(the delay between mails might get tweaked), but in general this has
worked for me.
Have fun.
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