For DLP and security reasons, we’ll need to block certain file types—like .exe, .zip, and other potentially risky files—from being uploaded through Messenger.

When someone tries to upload a restricted file type, we’ll send an automatic reply letting them know it’s not allowed. We can also point them to submit their request via email instead, since email is monitored by DLP.

Also, be able to choose which file types to block and customize the auto-reply message however you’d like.