Hi All

Is it possible to block an email if both the sender and recipient domain are 
the same?
Example - [email protected]<mailto:[email protected]> to 
[email protected]<mailto:[email protected]>

The reason I am looking to do this is we are going to be using Exim to handle 
incoming/outgoing mail for a domain hosted on Exchange so any mail for 
domain-a.com being emailed from a mailbox on domain-a.com will never leave 
exchange.  We still want a sender on domain-a.com to be able to email external 
domains, but want to prevent incoming emails destined for domain-a.com 
appearing as if they are coming from domain-a.com.

The only alternative I can see at this stage is to have two Exim boxes, one to 
handle incoming the other to handle outgoing.

Thanks for any help.

Regards,

Pete.
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