Author: David Woodhouse Date: To: Juergen Weiss [Netzland GmbH] CC: exim-users Subject: Re: [exim] Dont tell the client that user does not exist at smtp
time ?
On Mon, 2005-02-14 at 12:05 +0100, Juergen Weiss [Netzland GmbH] wrote: >
>But the customer wants to have the mailserver accept the message
>by now and just send a mail delivery error email back to the
>sender address.
>
>He says hotmail and yahoo does this like that way and dont tell
>the sending user the error directly on smtp time.
>
>Is there a configuration to avoid this behaviour ?
There is, but in general you should avoid it. If you accept mail from a
faked address which is addressed to a non-existent user, and then you
generate a bounce to that faked address, you are making yourself part of
the problem.
It would be OK to do it _just_ for this insane and broken customer
though -- turn off the 'verify=recipient' in your RCPT ACL _just_ for
the IP address(es) from which they connect, or for connections which are
authenticated, or something like that. Don't do it system-wide though.
