I think emails to my domains on Win19 are getting through now.
But, a question: some are arriving dated 26 Aug etc, so does it take a few days for DNS and so on to sort itself out? Is it possible that some have just vanished into the ether?
When email 'servers' are non responsive, as these with the DNS error were pointing, they queue up for a bit on the sending server. Once the server is up they send across.