Wietse Venema:
> With this:
>
> mailin.marc-werner.eu. 86060 IN MX 10 mx01.isphosts.de.
> mailin.marc-werner.eu. 86060 IN MX 100 mx02.isphosts.net.
> mx01.isphosts.de. 273 IN A 109.239.57.96
> mx02.isphosts.net. 285 IN A 127.0.0.1
As a matter of principle, when the Postfix SMTP client finds its
own IP address in the list of destination domain MX addresses, then
it WILL NOT hand-off mail to an equal-or-less preference MX host
or to an smtp_fallback_relay. This prevents mailer loops.
If a remote site lists 127.0.0.1 as an MX address then they are the
ones who create the problem, not Postfix.
I am not inclined to hard-code (more) special cases into Postfix
just to work around obviouly bogus DNS configurations. I would
rather implement a configurable DNS lookup filter.
Wietse
