Sending, receiving, and organizing email in Outlook.com
I have the same issue from this sender. Massive amounts of spam every single day. The problem is sometimes real email gets added to the junk folder. Therefore you must check junk mail folder regularly to ensure real mail isn't being deleted in the junk. Scanning for real mail in the junk is a horrible, tedious experience when you have 40+ email per day from Renew@ spam. Blocking each of these one by one does nothing, as every email somehow has a different address, despite starting with Renew@.
Microsoft needs to batch block or track down this specific spammer. It makes using Microsoft email experience horrible to the point of unusable. Please help.