Send an email to a channel in Teams not working

Brass Contributor

We can't send email to a Teams channel anymore. Stopped working yesterday. Emails bounce back with error: 550 5.4.1.


I did validate here: Send an email to a channel in Teams (


4 Replies
Same problem for our organization. I submit the problem by the service health and they say they don't have a problem with this service.

@FrancisBrisebois It seems to work now.

Our clients are reporting the same issues here.  Yesterday they were getting the 550 bounce email.  Later they sent and today some channels they can't email so it seems like it is in the works.

Yep, it's back now. Thanks guys