Forcing sendmail to use mail server according to From address

[Wolfgang Pfeiffer]

Hi All

First this: I'm on Debian. 
But as the sendmail features probably are the same on a RedHat/Fedora
system as on a Debian one I hope it's okay to ask here.

The problem:
I'm on a single user home machine,  and I have 3 different mail
addresses, from 3 different companies. And, when using these mail
addresses, I want to force sendmail to look for the appropriate
(external) mail server according to the From/Sender address I use when
sending mails. I.e. I want sendmail to send my mails to these external
mail servers, that I am allowed to use, instead of sending them directly
from my local sendmail to the mail servers responsible for the
recipients addresses.

Are there switches, settings in sendmail that can do this?

Thanks in anticipation
Wolfgang

PS: Sorry if you'll have a message like this a second time in your
Inbox: I sent a first mail with the subject already about 8 or 9 hours
ago. I never saw it on the list until now

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