Am Tuesday, 9. December 2014, 15.30:16 schrieb Mike Kellenberger:

I am seeing mails that can't be delivered to mail servers with cust.static.xxx-xxx-xxx-xxx.cybernet.ch dns names because these cannot be resolved.

Anybody else experiencing the same thing?

Had a similar issue a couple of weeks ago concerning former cybernet IP ranges used now by swisscom busniess customers. All their A and PTR entries got deleted from the Swisscom DNS Servers and replaced by slightly different entries.

Apparently those hostnames were not meant to be used as MX entries etc. because swisscom business customers have the ability to set own PTR records via customer portal and should do so.

Mit freundlichen Grüssen

Benoit Panizzon