Sendmail multiple routes

Inbound mail is normally routed through a Sendmail box to the office email server.  
I want to route email to me from a specific domain to both the office email server and to my home email server.  
How can I do that?
kyiuAsked:
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jlevieConnect With a Mentor Commented:
> Can I filter the sender?

Not at an Mail Transport Agent (MTA) level. Aliases and virtuser table only operate on the recipient of a message and there are no provisions to filter based on sender. That sort of filtering is the responsibilty of a Mail User Agent (MUA) like Netscape, Mozilla, Evolution , Outlook, etc.
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owensleftfootCommented:
Is it just for one or two users? The easiest way is to put a .forward file in the home directory of the user with the addresses of the remote users you want the mail sent to.
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kyiuAuthor Commented:
I don't understand the ".forward" file.  The idea is to get to my client's email when I'm not at the office.  I want to do it at the sendmail box.
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owensleftfootCommented:
Say your name on the linux box is paul. If you put a file called .forward in /home/paul on the linux box which contains the line paul@myhomeserver.com, any mail which comes to your linux box for paul will automatically be sent to the email address paul@myhomeserver.com. Its an inbuilt part of sendmail.
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jlevieCommented:
Depending on how the Sendmail relay is configured it may not be possible to do this on the relay. If the relay is using relay-domains or another method that relays everthing, as opposed to using explicit forwards via an aliases or virtusertable map you won't be able to do the forward on the Sendmail relay. In that case the "Cc'ing" of mail will have to be done on the "office email server".
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kyiuAuthor Commented:
I am doing releying already with virtusertable map.  There is no problem at all.  Expect now, I want to relay to two different place.  

I have no user account on the linux box.  The sendmail is just a email front-end.  It's used to protect the Exchange server.   No .forward file exist.
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jlevieCommented:
Okay, this can be done since you are doing explicity relays. Since the virtusetable map can only accept a single target the solution is to create an alias for the distribution, perhaps like:

dual-delivery:       addr@office.tld, addr@isp.tld

and then make that alias the target of the virtusertable record, like:

me@domain.tld     dual-delivery

Since virtusertable is expanded first mail to me@domain.tld will get mapped to dual-delivery. Then the alias expansion is done resulting in the message being sent to each address in the list.
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kyiuAuthor Commented:
Jlevie, I've just had tested the aliases approach.  It works, but on all the mails destine to my office.  I'm only interested on a specific sender.  Can I filter the sender?  I don't want to see hundreds of emails send to my personal inbox.

Thanks
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