How to configure sendmail

[Warren Block]

Olivier Nicole wrote:
> I have this stupide little configuration that I cannot manage to get 
> working.
> 
> I have one machine a.domain.net that I want to be able to deliver
> system mail (like cron and so on) with the following rules:
> 
> - user1 on a.domain.net has the same username as on domain.net; I
>   want that mail sent to user1 is delivered to user1 at domain.net;

An alias will do that.

> - user2 on a.domain.net has no corresponding user on domain.net, but
>   it has an alias defined; I want to mail sent to user2 is delivered
>   to the alias.

Creating an alias for a nonexistent user seems to work here.

> - of course, mail addressed to a full address x at y.z should be
>   delivered accordingly, eventually using a mail relay.

> I tried using masquerade in submit.mc,

I don't edit submit.mc, just <hostname>.mc.

>  user1 is then rewritten as user1.domain.net,

That's the masquerade...  Wait, is that a typo?  Should be 
"user1 at domain.net"?

> but the alias for user2 is not parsed

newaliases(1) is needed after editing /etc/mail/aliases.  And there is a 
bug if you're using 8.0:

http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/139870

> and user2 is also rewritten as user2 at domain.net.

Masquerade again.  Not clear whether that's what you want.

-Warren Block * Rapid City, South Dakota USA