Helping people with computers... one answer at a time.
Most email programs have the ability to block email from a specific address. Unfortunately blocking a sender it an ineffective way to block most spam.
How can I block addresses that come repeatedly to my junk email box? It says I am blocking but it does not work.
Blocking is overrated.
It promises to prevent a sender's email from reaching you. But if that sender is determined enough, the block is easily bypassed.
And spammers are determined ... boy, are they determined! So much so that blocking senders is pretty much useless in the war against spam.
I'll explain why and what I'd do instead.
I want to start by clearing something up.
You said that the mail is coming "repeatedly to my junk email box". That may be what blocking means in your email program; telling your email program nothing more than "when email from this sender arrives, just put it in the junk folder".
That's one definition of blocking.
Different email programs use different techniques and definitions, but if that's the way your program works, then it's working as expected.
Spammers work hard to mislead you. One of the ways that they do so is to make email addresses look like they're from someone that they're not.
Email addresses are typically comprised of two parts: the email address itself, and an optional "display name". For example, you might see:
There you can see the display name, "Leo A. Notenboom", and the email address, firstname.lastname@example.org, and it's pretty obvious which is which.
The display name is optional, but if it's present, many email programs will only display it, and not the actual email address by mistake. In that case, your email program might show you something like this:
Your email program might show you the actual email address if you hover over that, or perhaps click on it.
Spammers do this:
Here the display name is "email@example.com", but the actual email address is "<firstname.lastname@example.org>". In some email programs, what you might see is this:
It looks like email from email@example.com, but it's not.
You can block firstname.lastname@example.org if you want, but that won't block this particular email because that's not where it came from.
Because spammers can manipulate the "From:" address so easily, there's another technique they use that also renders individual address blocking completely ineffective.
They simply don't send "From:" the same address more than once.
You might get the exact same spam over and over, but each time it'll be "From:" a completely different address. You can block that address if you like, but that won't impact they next spam that comes from a different address. Or the one after that. Or the one after that.
Couple that with the tricks that spammers use to mislead you as to exactly what email address is really being used, and things get very confusing very fast.
The short answer is that using sender blocking to stop spam is a waste of time and effort.
Most email programs, and almost all web-based email services, have the ability to mark emails as spam. This then allows the service to learn what is and isn't spam. While the spam may not get blocked immediately, as you report more and more spam over time, more of it will get blocked.
Google's spam filter as used in Gmail seems to be particularly effective these days.
If that doesn't work, then my suggestion is to relax and just use your Delete key. It's simple, quick and 100% accurate.
Blocking is good as a start for just about anything that isn't spam.
For example, if there's an individual that you specifically want to block, then you can block their email address.
But as I mentioned earlier, even then blocking will be ineffective if they are sufficiently motivated to get through.
All they need to do is get a new email address to send from. And those are trivially easy to get.
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