Emails marked bounced?

A number of our emails from adobe esign seem to be marked as bounced in our documents history. They are not going into junk or spam. The emails are not being received at all.

This all seemed to be on the 07/01/2016. It was Microsoft office 365 and hotmail bouncing the emails. The funny thing is the email account linked to our adobe account was bouncing them too.

Is there an issue here with Microsoft and adobe document cloud?