Autor: Peter Bowyer Data: A: Exim, Users Assumpte: Re: [exim] not generating undeliverable mail messages
On 09/01/07, Phill Harvey-Smith <phill@???> wrote:
<snip>
> We are having problems with spam email bounces generated from
> undeliverable addresses on the servers that we route for, the problem
> being that protein has no way of knowing if users at the system it
> forwards for exist, so has to accept all mail for them and attempt
> delivery, which of course if it fails generates a bounce message, often
> containing spam. What I would prefferably like to do is just drop these
> on the floor and generate no bounce back.
>
> Does anyone have any idea how I would go about doing this, or have a
> better sugestion as to what would be a better course of action.
If, as seems to be implied, the target system rejects nonexistant
recipients inline, then a simple 'verify=recipient/callout' in the
right part of your RCPT ACL will prevent you receiving mail for
invalid recipients on that target system.
You can configure the behaviour at this point - whether you blackhole
them or reject them is up to you - rejecting is generally better
because a non-zero percentage will be genuine mis-typed addresses
which should be notified to the sender.
