DNS resolution problems with nameserver of post.ch and incamail.com

We’re currently seeing issues with the nameserver of Swiss Post which are responsible for post.ch and incamail.com domains. TLSA records cannot be resolved anymore yielding to connection timeouts. Therefore SEPPmail Outbound systems cannot deliver outgoing mails to these two domains at the moment as the TLSA (DANE) could not be determined. Other DNS RR types can still be resolved, currently looks like only TLSA is affected.

Our systems will hold such mails in their queues and regularly try to resolve the RRs again. As soon as they can be resolved again the mails will be delivered. No action required from customer. And no mails should be lost.