Comments on: Postfix Gmail SMTP Relay

By: practicalclouds

practicalclouds — Fri, 02 Sep 2011 16:50:00 +0000

Great article, thanks – still very useful today, despite being a few years old!

I found that simply relaying from a server containing a postfix install via google can work without having to create the SSL certs at all. I created the /etc/postfix/sasl_passwd file and added this to /etc/postfix/main.cf instead: -

relayhost = [smtp.gmail.com]:587

#auth
smtp_sasl_auth_enable=yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

#tls
smtp_use_tls = yes
smtp_sasl_security_options = noanonymous
smtp_sasl_tls_security_options = noanonymous
smtp_tls_note_starttls_offer = yes
tls_random_source = dev:/dev/urandom
smtp_tls_enforce_peername = no

Very easy as creating the cert was the fiddly bit – and one that I wished to automate, as I’m adding a profile for an Amazon EC2 instances which will do this automatically when you start up a new instance (it is a pain to relay email from Amazon EC2 as it is generally not trusted).

Once written the profile will be here: http://www.practicalclouds.com/content/guide/gmailrelay (I’ll be sure to link back here)

Many thanks

Dave

By: jon zendatta

jon zendatta — Tue, 07 Jun 2011 18:07:10 +0000

I got this working on Ubuntu 10.10 Cheers

By: Lokalt backupscript for Ubuntu | Techsiden

Lokalt backupscript for Ubuntu | Techsiden — Tue, 31 May 2011 18:41:39 +0000

[...] Alt jeg har gjort er å sette opp at scriptet sender en mail til ønsket mailadresse når scriptet er ferdig med å kjøre. For at dette skal fungere må pakken mutt være installert. (aptitude install mutt) og at serveren din kan sende mail. Jeg velger å sende via Google (Gmail) sine SMTP servere. Her er en guide for å få til dette: http://bookmarks.honewatson.com/2008/04/20/postfix-gmail-smtp-relay/ [...]

By: The Social Expo

The Social Expo — Thu, 10 Mar 2011 01:41:34 +0000

It should be the “+” symbol.

By: Mario Uzae

Mario Uzae — Wed, 02 Mar 2011 02:14:27 +0000

Thaks for everything !!

By: Michael M

Michael M — Sat, 01 Jan 2011 12:34:58 +0000

I just got this working on my Ubuntu 10.10 box with Postfix 2.7.1. This is all I have in the /etc/postfix/main.cf file.

relayhost = [smtp.gmail.com]:587
smtp_use_tls = yes
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_tls_loglevel = 1
smtp_tls_per_site = hash:/etc/postfix/tls_per_site
smtp_tls_CAfile = /etc/ssl/certs/Equifax_Secure_CA.pem
smtp_tls_session_cache_database = btree:/var/lib/postfix/smtp_tls_session_cache

—

% cat sasl_passwd
[smtp.gmail.com]:587 user@gmail.com:pass

—

% cat tls_per_site
smtp.gmail.com MUST

By: Joe

Joe — Thu, 16 Dec 2010 00:29:03 +0000

Thank you. Great tutorial.

By: Sven

Sven — Fri, 12 Nov 2010 15:02:00 +0000

Thank you. Great tutorial. Worked within minutes. I just added in main.cf

smtp_tls_CApath = /etc/ssl/certs

In mail.log I still see a minor: Nov 12 14:27:27 voice postfix/smtp[5081]: certificate verification failed for smtp.gmail.com[209.85.227.109]:587: untrusted issuer /C=US/O=Equifax/OU=Equifax Secure Certificate Authority

By: deebocean

deebocean — Tue, 09 Nov 2010 04:35:00 +0000

for me (Centos) i had to make “ldd /usr/libexec/postfix/smtp” instead of “ldd /usr/lib/postfix/smtp” to work

By: Alex

Alex — Fri, 22 Oct 2010 21:05:18 +0000

I have a question, what is all the fuss about setting up a SMTP server that at the other end uses google’s SMTP to send mails?

why not use google’s SMTP service directly, without using postfix?

Alex