> -----Original Message-----
> From: exim-users-bounces@???
> [mailto:exim-users-bounces@exim.org] On Behalf Of Peter Bowyer
> Sent: Friday, June 24, 2005 12:36 PM
> To: Exim Mailing List
> Subject: Re: [exim] reject recipient that doesnt exist on
> internal server
>
> On 24/06/05, reef <reefro@???> wrote:
> > Im having a hard time finding how to do this.. I have an
> exim server
> > here that accepts mail and then relays on to an internal exchange
> > server... it's not causing any problems really, but there are some
> > email addresses that don't exist on the exchange server, that keep
> > getting sent quite a lot of mail, and i'd like for them to
> bounce at
> > the exim end
I suggest you DENY the rcpt in the acl_smtp_rcpt ACL,
rather than bounce them (later) -- and for this you must
do it at the first server, Exim in your case during the
"rctp" ACL.
The key is "verify" and you may wish to do a "callout"
to the Exchange server.
For callout, the Exchange server must be willing to
accept either a "mail command with recipients" or a "vrfy"
the recipient in the callout for this to be fully verfied.
With callout your Exim just makes a client call to Exchange
to see what would happen if it TRIED to send the MAIL to
a RCPT.
> > off my stats, showing lots of mail for users that don't exist. I'd
> > ideally like to have a list of users for exim to reject when they
> > first attempt to deliver mail. I could also do some kind of
> LDAP setup
This is an alternative to a verify/callout if you
wish to use a file lookup or LDAP query -- conceptually
the LDAP query is similar to the mail callout (both are
network protocols etc.) but practically the LDAP is
handled like a list lookup and the verify is a separate
type of option.
How about these references:
Verify:
http://www.exim.org/exim-html-4.50/doc/html/spec_39.html#IX2558
39.30 Address verification
http://www.exim.org/exim-html-4.50/doc/html/spec_39.html#SECT39.30
(Callouts follow on the same page)
I am new to Exim so likely these references will explain it
better than I could, but they will get you started while
waiting to see if someone else will provide you the precise
acl_smtp_rcpt ACL code.
