Sometimes you will find that your servers IP address is becoming blacklisted because of spaming...Getting Office/Outlook to work with Sage 50
Some users have experienced issues with getting Office and/or Outlook to communicate with Sage...Hotmail not receiving your emails?
PTR (rDNS) and SPF setup on your domain is recommended which help hotmail servers to view emails...Why is Spam Cannibal Blocking My Emails?
If you are experiencing an issue with Spam Cannibal blocking email, a personalized valid rDNS...Email returned, Rejected by Recipient or Blacklisted
If you receive a bounce back error that you cannot figure out. Please contact technical support...