See the comment on about line 95 of the transport file...
#        domain transport:nexthop
#               Mail for domain is delivered through  transport  to
#               nexthop.


Try this:

Edit /etc/postfix/transport
some.net smtp:[smtp.smarthost.net]


-- 
Christopher A. Gahlon

There are 10 kinds of people in the world, those that understand 
binary and those that don't.


On Wednesday 15 September 2004 13:39, rpgoldman at real-time.com wrote:
> My desktop machine slurps in emails from multiple different email
> addresses, and sends them out using postfix (with my ISP as a smart
> relay).
>
> What I would LIKE to do, is to choose the relay destination based
> on the From: header I put on my emails.  That way mail from my
> personal real-time.com address would go out through
> mail.real-time.com, and mail from my work address would go through
> my work server.
>
> Unfortunately, AFAICT postfix allows for you to choose your relay
> based on the DESTINATION, but not based on the source.  Anybody
> know how to end run this?
>
> I wonder if some abuse of the virtual hosts facility might handle
> this problem...
>
> Thanks,
> R
>
>
>
> _______________________________________________
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