And another interesting resource that I had never come across, so I'm sharing it with you. It is the wiki of the Anti-Spam Research Group (ASRG). THE ASRG no longer exists since 2013but on the other hand its wiki continues to live, in particular via the contributions of John Levine.
After a little exploration, the part that seems to me the most interesting is the referencing of a very large number of techniques used to fight spam, with information like the date of first use of the technique, if it is widely used, if it is effective, ...
Here is the link to the index of this section of the wiki: https://wiki.asrg.sp.am/wiki/Taxonomy_of_anti-spam_techniques
Need help?
Reading content isn't everything. The best way is to talk to us.
(Feel free to reread the article that Badsender published on different types of spam filters)