E-Mail accepted by smtp.comcast.net, but never delivered
I'm having an issue that started sometime late yesterday (12/31/2019).
I am sending outgoing e-mails to smtp.comcast.net, using TLS on port 587. I get a response in my logs that the message was accepted for delivery. However, the messages are never delivered, neither to an inbox or a spam folder. I've tried sending mail to several different outside addresses and none are being delivered, so I've narrowed this issue down to a problem at smtp.comcast.net.
Anyone else having this issue? My outgoing e-mail setup has been working fine for ages and I haven't changed anything.