Author: Peter Bowyer Date: To: Exim, Users Subject: Re: [exim] not generating undeliverable mail messages
On 10/01/07, Phill Harvey-Smith <phill@???> wrote: > Peter Bowyer wrote:
> > On 09/01/07, Phill Harvey-Smith <phill@???> wrote:
> >
> > <snip>
> > 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.
>
> However, rejecting however will still send a copy of the email back to
> the supposed sender, which for the most part will be spam, rather than a
> genuine email, so the overall effect is that someone still gets spammed.
No, that's not correct. A reject is the correct course of action.
Genuine MTAs connecting to you will do the 'right thing' with the
mis-typed recipient. Spam MTAs will simply ignore you.
The action to avoid is 'accept-then-bounce' - where you can't make a
determination at SMTP time, learn later that you don't want the mail,
and have to decide what to do with it after the fact. Exim's ACLs make
this easy to avoid.
