[Pkg-exim4-users] unconditional forwarding for certain email addresses

[Gary Koskenmaki]

Hi all,

I'm a newbie Exim4 admin so don't flame me too hotly.... ;)

I have a working Exim4 install and it's been giving me no problems but I
have an issue I haven't been able to work around.  We forward email for
several domains we host and local mail from the internal lan.  We do not
implement a pop3 server as per management decision.  

The issue I'm having is we are a distributed environment and we also
have employees that travel a lot.  Not all the remote employees have
static IP addresses so I can't just configure exim4 to unconditionally
forward email from their IP addresses and that is impossible for road
warriors. This results in any email sent from their remote address being
bounced if it is not addressed to a domain for which we forward
mail.    

Could someone point me to how to configure exim4 to unconditionally
forward mail from certain email addresses just like it's possible to do
with IP addresses or network blocks?  I've spent quite a bit of time
Googling this issue, have Philip Hazel's book, and Debian's
documentation but just can't find anything that addresses this specific
issue.  Maybe it's just because I'm not using the correct search
terminology, but I've put quite a bit of time into this already and have
drawn a blank so far.