[exim] Detecting the domain part of a host address

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Author: Marc Perkel
Date:  
To: exim users
Subject: [exim] Detecting the domain part of a host address
What would be the method of detecting the domain part of a host address?
For example:

82-46-151-246.cable.ubr04.perr.blueyonder.co.uk

How would you write an ACL that would extract the blueyonder.co.uk part?


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