mx vs relay protection

Mike Helm <[email protected]> Thu, 04 Aug 2005 15:30:41 -0700
Newsgroups gmane.comp.encryption.pgp.keyserver-folk
Message-ID <[email protected]>
Does anyone have any contact info for the  demon.net pgp keyserver?
It's mx'd to a couple of addresses, and one of them
bounces every update when it happens to get involved, like
so:

[email protected]

The original message was received at Wed, 03 Aug 2005 15:26:34 -0700

  ----- The following addresses had permanent fatal errors -----
<[email protected]>

  ----- Transcript of session follows -----
... while talking to relay-1.mail.demon.net
>>> RCPT To:<[email protected]>
<<< 550 relay not permitted
--------

I've not been able to raise anyone at demon.net to deal with this.

I assume it's either some kind of daft spam control.

BTW, this happens periodically with lots of key servers - 
watch your MX backup servers, your local mail rules and anti-spam
measures might knock out your pgp key server incremental service.

Thanks, ==mwh
Michael Helm
ESnet/LBNL