I have a problem with my hotmai account or now called Outlook.Whenever I try replying to a receipent who has sent me a reply I get the following error: 

his is an automatically generated Delivery Status Notification.

 

Delivery to the following recipients failed.

 

       *** Email address is removed for privacy ***

 

I know for sure there is nothing wrong with the receipient's email server and the address is a good one. however this same error has happened with several other contacts of mine. Does anyone have any support email or phone number where I can talk about this issue ? the other thing about this issue is the delivery failure error happens immediately following sending the reply. lastly have called via phone the receipient to ask if they are having any issues with their email service and in each time they have said no. 

Thanking you

Victor