[Pkg-exim4-users] Is this at all possible?

[Neil Briscoe]

Some of you may remember me writing a couple of months ago about how I 
could relay mail through more than one smart host.

I was pointed at chapter 20 of the manual, which I read and understood 
at the time - although I'll need to re-read it now. ;-))

The thing is we have now got rid of one of our anti-spam/anti-virus 
services and only have the one remaining.

So whats the fly in the ointment?  Well, not every domain we host has 
signed up for the anti-spam service.

So whilst I'm fine for incoming mail - (just set the MX records to point 
to the service and then program that to forward the mail to our server) 
- mail emanating from our server cannot all be forwarded by their 
outgoing systems.

So what I need is a way, if possible, of saying, if mail is *from* these 
domains, then go via the smarthosts, otherwise, just do normal MX lookup 
as normal.

I know MTA's aren't particularly good at this - but their might be a 
directive I can use.  (one lives in hope).

Regards
Neil