Question

14

How can I configure Postfix to send all email through my Gmail account?

rated 0 times [ 14] [ 0] / answers: 1 / hits: 36533 / 2 Years ago, mon, october 3, 2022, 1:09:10

I'm trying to send an email through Google from my localhost.
(via PHP5.3)

But Google keeps on blocking my requests.

I tried to follow the solutions given to a few similar questions, but for some reason they do not work.

I followed these instructions to configure it - http://www.dnsexit.com/support/mailrelay/postfix.html

Now for the config data:

my main.cf file looks like that:

relayhost = [smtp.gmail.com]:587

smtp_fallback_relay = [relay.google.com]

smtp_sasl_auth_enable = yes

smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

smtp_sasl_security_options =

my sasl_passwd looks like that:

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

and that is how the mail.log rows look like:

Dec 14 10:24:50 COMP-NAME postfix/pickup[5185]: 1C3987E0EDD: uid=33 from=

Dec 14 10:24:50 COMP-NAME postfix/cleanup[5499]: 1C3987E0EDD: message-id=<[email protected]>

Dec 14 10:24:50 COMP-NAME postfix/qmgr[5186]: 1C3987E0EDD: from=, size=483, nrcpt=1 (queue active)

Dec 14 10:24:50 COMP-NAME postfix/smtp[5501]: 1C3987E0EDD: to=, relay=smtp.gmail.com[173.194.70.109]:587, delay=0.61, delays=0.19/0/0.32/0.1, dsn=5.7.0, status=bounced (host smtp.gmail.com[173.194.70.109] said: 530 5.7.0 Must issue a STARTTLS command first. w3sm8024250eel.17 (in reply to MAIL FROM command))

Dec 14 10:24:50 COMP-NAME postfix/cleanup[5499]: C20677E0EDE: message-id=<[email protected]>

Dec 14 10:24:50 COMP-NAME postfix/bounce[5502]: 1C3987E0EDD: sender non-delivery notification: C20677E0EDE

Dec 14 10:24:50 COMP-NAME postfix/qmgr[5186]: C20677E0EDE: from=<>, size=2532, nrcpt=1 (queue active)

Dec 14 10:24:50 COMP-NAME postfix/qmgr[5186]: 1C3987E0EDD: removed

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4 Years ago

answered 2 Years ago terose · Accepted Answer

You need to enable TLS in Postfix's SMTP client, since Google requires it. This is indicated by them in the message "Must issue a STARTTLS command".

In /etc/postfix/main.cf, you want something like this:

smtp_tls_policy_maps = hash:/etc/postfix/tls_policy

and then in /etc/postfix/tls_policy:

[smtp.gmail.com]:587 encrypt

The left hand side in tls_policy must appear exactly the same as your relayhost entry in main.cf.

Remember to run postmap on /etc/postfix/tls_policy after creating or changing it as required.

You can find more details in Postfix's TLS documentation.