On Wed, May 05, 2004 at 12:05:37PM +0100, Alan J. Flavell wrote:
> I've now started rejecting mails which have null envelope senders and
> are addressed to some of these "receive-only" addresses, with the
> response:
> | This address does not send mail; nondelivery reports are rejected as fakes.
> Does the team think this is a reasonable thing to do? Is the message
> clear enough? Am I missing some unexpected knock-on effect? Sure,
> we'll now also repudiate this address if a callout is attempted for
> it, but as it's only active for receipt of mail (viz. mail which has
> non-null envelope sender), and never actually sends anything, this
> seems to me to be not only harmless, but possibly even beneficial, no?
I'll add my "me too" and say that this is a good idea.
Note that the dual of this (disallowing the use of send-only addresses --
such as VERP addresses or signed sender addresses -- in a recipient
context) is more troublesome because of Postfix's habit of doing CBV from
postmaster@$qualify_domain.
--
Tony Finch <dot@???>
http://dotat.at/
