Hello there Rufflebug.

Having a Spam bomb Create a new email address and set up forwarding from your old one. Leverage the new provider's (e.g., ProtonMail/iCloud) strong spam filters. Note: Be careful with iCloud settings, as improper configuration can lead to errors

The sad fact is that there is no way to eliminate spam entirely. The best solution is to be very circumspect about who you give your email address to, but it will still inevitably get out there and you will get spam. Its part of digital life.

Manual filtering is about the least efficient, least effective method of control. Almost every spammer is dedicated to changing their apparent address and origin with every spam. If you try to filter on that address, chances are that it will never be used again. Filtering by a spammer's address is only good if you keep getting stuff from the same address, which is rare in my experience.

Otherwise, Thunderbird has a built-in Bayesian filter that is able to analyze messages and make an educated guess whether it is spam or not. But that filter must be taught whether a message is or is not spam. It's not 100% effective, but it can help a lot. If you are finding spam in your inbox and simply deleting it, you're not training the database. You must explicitly mark it as Spam. Similarly, you must explicitly mark non-spam as such. Check out this article that gives a good overview on how to use and train the adaptive filter:

https://support.mozilla.org/en-US/kb/thunderbird-and-junk-spam-messages

An aspect that many people miss that you have to train GOOD messages as well as SPAM.

If you're techie enough, manual filters can be crafted to be more effective in some cases by using the add-on "FiltaQuilla". This addon enables the use of Regular Expressions to detect more subtle variations in spam header information. It does take some learning and trial-and-error by the user, so you may or may not find it useful.

https://addons.thunderbird.net/en-US/thunderbird/addon/filtaquilla/

Hello there Rufflebug

Yes, regarding the risks of forwarding. If the original account continues to receive spam, the new account may identify it as the source and block it. Also, using Thunderbird's built-in tool is the best approach, and yes, we have that Bayesian filter available Using much filter aren t hurting nobody , it also does not attract hacker’s,you are safe.

What I meant was to use the server-side filters of the new email providers, as they seem to have stronger spam protection. You should set these filters up in those new accounts. If you don't, it would be like transferring all the spam as well.. Proton Mail offers a very strong "fence" against spammers and malicious actors.