Spam emails with no sender address

Doesn't this mean "Delete all messages except for those with blank sender address" ? [Dangerous]

Wrong. The rule Deletes ALL messages EXCEPT the ones with @ sign in the address. All email address that has @ sign will be untouched.

Tell us, when was the last time you found a legitimate email address that does not contain @ sign?

Now I understand why my many ignore the suggestion. They don't understand email technology.

UPDATE: 9/6/2023

This is working at least it's dumping them into the junk mail folder and I can delete or add them to the safe sender list.

i've had the same problem and I have several email accounts so it is annoying.

I'm not a techie so please excuse my lack of knowlege.

SO today I tried changing junk mail options settings for each email account

I selected safe senders mode only
(this will probably auto send everything to junk mail and I'll have to individually

add the safe senders to my safe list)

Also you can choose the international tab in junk mail options
and choose which contries are not allowed to send email or junk to you as well as some country specific encoding.

I'll write back to you all if it works or not.

Cheers!

I can't find that menu (that lets me specify "blank sender") in Outlook 365, nor is it an option in "manage rules". Where did you find it?

I followed those steps and I could not view the header (MS 365-Outlook), but the BODY of the email had a reference to a website with www.hiboss.edu." as part of the displayed HTML code in it. I created a rule that searched for that specific body text and deletes it. Worked great (for now). However, there may be other such spam with different content, so I am pursuing writing a macro that searches for the empty sender or the
removed for privacy" text and delete it that way. I already have a macro that does something similar for junk senders containing "/"s and other special symbols as part of the name. That will save me some work.

Maybe some good hacker with a good block on their incoming mail (for protection) could spam that sender with a few million msgs a day as a DOS and teach him a lesson.

No, because of the exception of the "@". I've got over two thousand emails in my inbox, they are still there. :) Follow exactly what the picture tells you to do.

Doesn't this mean "Delete all messages except for those with blank sender address" ? [Dangerous]