Block Sender and Block Domain aren't stopping a nuisance

[JO666]

I set up a rule to block emals that didn't show a sender's address. It only works sometimes.

[Islanderuk]

I have been told by another helpful contributor the following which seems to work

You need to look for the spammers true domain by looking at the headers of the email. If you select the email then go to the "More" button in the menu bar then click on "View Source" it will show the full details regarding the email and you should be able to find the originating domain. It is that that you need to block.

[licquorice]

You are replying to a year old thread