I got some bounces today too.
Yep, looks like Verizon/Yahoo/AOL haven't fully fixed the issue yet where they're incorrectly bouncing emails in some cases.
Postmark, our email provider, is tracking the issue here: https://status.postmarkapp.com/incidents/161371
I’m having the same problem.
We've got an update from Postmark that the problem is now mostly fixed and Verizon domains are starting to deliver emails correctly again. There may still be a few bounces tonight, but hopefully everything will work itself out completely by tomorrow.
Thank you! I saw many email bounces today also, not typical too see many emails bounce.