Different relay for different senders

Hi all,

I was wondering if I can setup postfix so that whenever
user1@mydomain.com sends an email it uses relayhost1 and whenever
user2@mydomain.com sends an email it uses relayhost2?

I know I can setup a transport so that the relay is selected depending
on the destination domain. Instead, I want the FROM: field in the
email to dictate which relay is used.


Thanks,

Ivan C.

My edit - I didn't realize email addresses where editted. Should read
user1 (at) mydomain.com and user2 (at) mydomain.com

icorretj@gmail.com wrote:
> Hi all,
>
> I was wondering if I can setup postfix so that whenever
> user1 (at) mydomain.com sends an email it uses relayhost1 and
whenever
> user2 (at) mydomain.com sends an email it uses relayhost2?
>
> I know I can setup a transport so that the relay is selected
depending
> on the destination domain. Instead, I want the FROM: field in the
> email to dictate which relay is used.
>
>
> Thanks,
>
> Ivan C.