Mail Proxy

[Maxim Dounin]

Hello!

On Mon, Apr 18, 2011 at 10:20:11AM +1000, SplitIce wrote:

> Ive been fiddeling with nginx's mail proxy features. I would like to know if
> its possible for nginx to proxy mail from non-authenticated senders
> (incoming mail - MX records)?

Yes, in 0.7.22+.  You'll need 

    smtp_auth none;

and appropriate authorizer script which will check 
Auth-SMTP-Helo/Auth-SMTP-From/Auth-SMTP-To headers instead of 
normally checked Auth-User/Auth-Pass.

Maxim Dounin