[pqvst]

We first started getting bounce notifications around 7 hours ago, I'm surprised it took this long for Postmark to announce the service issue.

We're seeing responses like this in our logs:

smtp;550 5.7.1 Service unavailable, Client host [<ip>] blocked using Spamhaus. To request removal from this list see https://www.spamhaus.org/query/ip/<ip> (AS3130). [DM6NAM04FT060.eop-NAM04.prod.protection.outlook.com]

Historical "Time to Inbox" available further down on this page: https://status.postmarkapp.com/