On Tue, Jun 25, 2013 at 08:55:08PM -0000, John Levine wrote:
> > If someone doesn't want a domain name to get email, the solution
> > is simple. Don't start an SMTP listener. For bonus points, don't publish
> > MX records for the domain either. Avoid having A or AAAA records too, or
> > at least make sure they go somewhere that doesn't listen for SMTP.
>
> That "works", but it will take a week of repeated connection attempts
> before the message times out. As I think I said, the person who asked
> has a domain a typo away from a very popular one, and would like to
> get rid of the unwanted traffic efficiently while still having his
> web server or whatever on the A record.
>
> The IETF had and currently has no opinion about this hack either way.
> I'm trying to figure out whether it's worth resuscitating the draft
> and publishing it.
It also acts a joe-job deflector, receiving systems can drop mail
alleged to be from the domain as a forgery.
Does any MTA other than Postfix implement nullmx? If this is
supported by Exim, Postfix, and Sendmail the rest have insignificant
market share on Unix. Leaving largely in some order:
- Microsoft Exchange
- Gmail
- Yahoo
- AOL
--
Viktor.
