relaying mail

[Derek Ragona]

At 05:19 PM 7/31/2007, Christopher Cowart wrote:
>On Tue, Jul 31, 2007 at 08:03:50PM +0200, Michael Grant wrote:
> > In one of my domains, I have the MX record for it set up to my server.
> >  But for one of the users within that domain, their mail needs to be
> > shuffled off to a different server at google.  But I can't just
> > forward it because it's like an MX host I'd need to forward it to.
> > And I can't alter the MX to point to google for the entire domain
> > because it's only one user within that domain, the other users will be
> > screwed in that case.
> >
> > For example, mydomain.com, let's say the mx for that comes to my box.
> > For joe at mydomain.com, I need to send his mail to ASPMX.L.GOOGLE.COM as
> > if it were the MX for mydomain.com.
> >
> > In the old days, one would simply forward email to
> > joe%mydomain.com at ASPMX.L.GOOGLE.COM.  That would cause mydomain.com's
> > sendmail to connect to ASPMX.L.GOOGLE.COM and shove down a message for
> > joe at mydomain.com.  But that seems long deprecated because it didn't
> > seem to work.
> >
> > I am using sendmail and procmail.  Can anyone think of some way I can
> > cause something like this to happen for just one user, ideally in a
> > .procmailrc file?

You can do this with sendmail by user in /etc/mail/virtualusertable.  You 
should see the file /etc/mail/virtualusertable.sample for some explanations 
of this file.  The virtualuser database is read first by sendmail, before 
aliases.  Also the virtualusertable is read serially from top to bottom, so 
you can specific user maps before a general map for the rest of a domain.

         -Derek

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