You THINK the filter isn't doing it's job...have you checked the HEADER?
Have you checked for variances in the address or differences between the listed sender and the address you blocked?
Have you done some thinking to see if that mail is actually being imported from another address and if so blocked it there?
Have you checked to see if a site you signed up for is reputable or has been hacked lately?
Have you read the terms for using the site? Nobody has forced you to use the site. You have no implied warranty for a free email site. This site here is a PEER TO PEER support site, and assisted by moderators. The people that are trying to help can be seasoned
tech workers or they can be average users who want to help others with what they know. But you have to do your own homework as well. Don't assume that it is a problem for everyone, because it certainly isn't. A vague my email is broken is of little use, there
are different reasons for that for any user. You can't tell a doctor it hurts here and expect them to write a prescription without details.