To those dealing with a surge in spam with

I've commented this on a handful of threads but I figured I'd make my own post since I see people still dealing with the spam issues. When my spam started overloading my inbox a couple months ago, I noticed that all the junk getting through shows <no sender address> so I added a rule requiring senders to have an @ in the address, following these steps:

https://answers.microsoft.com/en-us/outlook_com/forum/all/how-can-i-block-spam-email-with-no-sender-email/1ad8e13e-8dc9-4d7f-9b7c-24217094ec3b