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 mygmailuser@gmail.com: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=<20121214082450.1C3987E0EDD@COMP-NAME.localdomain>

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[]:587, delay=0.61, delays=0.19/0/0.32/0.1, dsn=5.7.0, status=bounced (host smtp.gmail.com[] 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=<20121214082450.C20677E0EDE@COMP-NAME.localdomain>

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

  • my guess is that it is somehow related to Dec 14 10:24:50 COMP-NAME postfix/qmgr[5186]: 1C3987E0EDD: from=<www-data@COMP-NAME.localdomain>, size=483, nrcpt=1 (queue active) how do I change the 'from'? to a legal one?
    – gmadar
    Dec 14, 2012 at 8:53

3 Answers 3


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.

  • PS. You may also have a sender address problem, but currently you're not getting that far. You'll need to fix the STARTTLS issue before you'll find out. Dec 14, 2012 at 10:05

This very simple tutorial helped me a lot to do it.

It gives quite the same info but it worked for me.


Please follow the Ubuntu GmailPostfixFetchmail Community Documentation

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