On Mon, Oct 25, 2010 at 7:13 AM, Dmitrij Czarkoff <czarkoff@gmail.com> wrote:
If you can find the sendmail equivalents here's some possibly helpful
notes from my postfix setup.
main.cf (postfix's main configuration file) has (among much more):
=========================================
relayhost = [smtp.comcast.net]:587 # points to my ISP's mail server
sender_dependent_relayhost_maps = hash://etc/postfix/relay_map
#sender dependent override for above default
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd #the db of
user / password pairs
=========================================
The relay_map file is something like:
=========================================
@chrissmith.org [smtp.gmail.com]:587
@domalias1.com [smtp.gmail.com]:587
@domalias2.com [smtp.gmail.com]:587
...
@gmail.com [smtp.gmail.com]:587
=========================================
Basically, if the post isn't for local delivery (Cyrus in this case)
Postfix delivers via the relayhost path unless there's a sender match
in this relay_map file, then it uses that path. So only email sent
from my Google Apps/Gmail accounts go through Gmail's servers (that
way the sent messages show up in the web interface as well).
The sasl_passwd file is pretty straightforward as well:
=========================================
me@chrissmith.org me@chrissmith.org:mypasswd
alias1@chrissmith.org me@chrissmith.org:mypasswd
alias2@chrissmith.org me@chrissmith.org:mypasswd
me@aliasdomain.org me@chrissmith.org:mypasswd
...
me@gmail.com me@gmail.com:mypasswd
[smtp.comcast.net]:587 myusername:mypasswd
=========================================
Notice that when sending via a Google Apps validated name or domain
alias that the authentication remains with the actual mailbox account
and will indeed be the "envelope sender" - but not the "sender" or
"from:" address, which is determined by your email client unless your
local smtp server is rewriting the "from:" addresses (I'm not doing
that).
As I'm using Google Apps with both user and domain aliases it's a
little more complicated then just having one default.
main.cf also contains other parameters - you do need to use auth to
send via gmail's servers:
=========================================
smtp_sasl_auth_enable = yes
smtp_sasl_security_options = noanonymous, noplaintext
smtp_sasl_tls_security_options = noanonymous
=========================================
