Re: [Exim] 451 Could not complete sender verify callout

On Thu, 2004-01-29 at 15:32 +0200, Johann Spies wrote:
> We use a server on our campus to send out email to suppliers and
> creditors of the university. A problem that we have this year is that
> a lot of messages fail with the error message in the subject line.
> That was not the case last year.

> Return-path: <BEG12@???>

Your message claims to be from the address BEG12@???. Many
people will be attempting to make a connection to that machine, and to
verify that it really does accept mail for that address. When they
cannot, they assume it's a faked sender address and don't accept the
mail.

Since there is a _temporary_ failure (the machine in question doesn't
seem to be running a mail daemon), you get a _temporary_ (4xx)
rejection.

Send mail from valid addresses, and it'll be a lot more likely to get to
its intended destination.

--
dwmw2