MS Team Channels Emailing - Spam prevention and Message Tracking?

[Chochi]

When you generate an email address for a Channel, it gives you a 2f1a7fec.contoso.com@amer.teams.ms address to use. 

My question is, what happens if/when malicious email/spam starts coming in to one of these addresses and starts filling up a Channel?  

More concerning is that I've noticed that you can not do a message trace on emails using that @amer.teams.ms, so how would you go about blocking an external sender from emailing a Channel? 

[#2 · Accepted solution]

Hi!

If you go to the “get email address” for a channel there’s an advanced option. Click it and you can here choose to only allow team members to send to this address or from specified domains!
See further down in this link:

https://docs.microsoft.com/en-us/microsoftteams/meeting-policies-in-teams

Adam