William Craven wrote:
> I have been noticing lately that a lot of messages in our queue have
> been frozen because Exim is sending bounce messages to non existant
> senders (eg forged senders with correct domains - for example
> bogus@???). These bonus senders are obviously spamming - and
> are sending to non-existant users on our system.
>
> What I would like to to is reduce the amount of bounce messages by
> verifying that the recipient address is valid on our system before
> accepting the message. I have read the ACLs section in the manual and I
> am uncertain as to which ACL block to use and what ACL.
>
> Anybody on this list can suggest what is suitable.
>
> Thanks
>
> Wm.
> --
> William Craven
> ITServices Email: William.Craven@???
> University of British Columbia Tel: +1-604-822-8955
> Vancouver, BC, Canada V6T 1Z2 Fax: +1-604-822-5116
>
> --
>
> ## List details at http://www.exim.org/mailman/listinfo/exim-users Exim details at http://www.exim.org/ ##
>
To do this you will want to use a "verify = sender/callout" acl. This
will verify the supposed sender address(es) before accepting the message
into your system.
