Author: John Burnham
Date:
To: Exim Users List
Subject: Re: [exim] Recipient Verification
>
> How would I configure Exim to verify recipients for inbound
> mail against the delivery smarthost prior to delivering?
>
Do a callout ?
http://www.exim.org/exim-html-current/doc/html/spec_html/ch40.html#SECTaddressverification
John