There is no secondary NS, as its only on an internal network at the moment for testing.
This is really annoying, as i havent touched the DNS records for 2 days now, but yesterday it all worked for a while (checked around midday), then lastnight and this morning i couldnt access cloud.mydomain.com again.
Then i play around with the DNS.. Just add a CNAME record, and its all working again.
But i dont understand why mail. and www. always work.