On Sat, 31 Aug 2002, Kevin P. Fleming wrote:
> 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.
Read more carefully - he wants to verify RECIPIENT addresses.
same syntax, different modifier. And probably no callout needed
deny !verify = recipient
message = Unknown user
>
>
> --
>
> ## List details at http://www.exim.org/mailman/listinfo/exim-users Exim details at http://www.exim.org/ ##
>
>
