[Pkg-exim4-users] Howto forward messages via my ISP?

[Andrew Holter]

Both at work & at home I have debian sarge, exim4 & fetchmail.

Mail is collected from the office ISP by fetchmail via pop3.

Mail is delivered to the office ISP/smarthost via SMTP.

I have set up /etc/exim4/passwd.client for SMTP authorisation.

My problem is that I want to automatically forward mail received by my 
account in the office to my home mail account.

If I set up an exim .forward file and try to deliver the message to my 
home account it is rejected by the office ISP because the message isn't 
from a permitted domain.

The best I have managed is to pipe the message through the mail command 
to deliver it to my home address. Unfortunately this breaks mime encoded 
messages & I haven't managed to recover any attachments from these messages.

Is there a 'Debian way' of handling this or do I have to roll my own 
exim transport?