Forum Discussion
Limit or Moderate emails with multiple recipients in Office 365
I would start with Exchange transport rules as that allows you to perform the outcomes you're hoping to (ie. if mail comes for this recipient, send a copy to that recipient - or - if this person sends an email, redirect it to their manager for approval).
Have a look here: https://technet.microsoft.com/en-us/library/jj919238(v=exchg.150).aspx
I would start with Exchange transport rules as that allows you to perform the outcomes you're hoping to (ie. if mail comes for this recipient, send a copy to that recipient - or - if this person sends an email, redirect it to their manager for approval).
Have a look here: https://technet.microsoft.com/en-us/library/jj919238(v=exchg.150).aspx
Thank you for responding to me
My requirement is if external user A sends email to multiple recipients in my organisation
Then that email should be routed to quarantine or i should be asked to moderate that email.
In short we want to be more cautious when multiple users are marked in email , from external sender to avoid spam and its larger impact
The HeaderMatches allows for limited wildcarding, so creating a rule to match something like To: .*,\s?.* won't work.
