In the past week or so, I have been getting emails with the subject Microsoft Outlook Upgrade that are mostly blank if I open them. While I have the option to delete them, all of the Archive, Junk, Block Sender, Move To etc. options disappear. I also cannot find any of these options if I open the email and right-click on it. Furthermore, when I delete the emails (4 so far today), they do not show up in the Trash folder. All of the email handling options show up for all the other emails in my account.
About the only thing I can do is right-click and View Page Source or Inspect. When I do that, it shows that the source is www.w3.org/1999/xhtml. But I cannot add this to my blocked sender list because I get an error message that says it is an incorrectly formatted email address.
So can someone please tell me how to junk these annoying emails (which occasionally also tell me that they are new kind of ad).