RTFM,
My ISP filters spam with Spam Assassin, but as others have indicated, a lot gets through presumably to ensure that valid mail is not filtered. I can see filtering holes that could be plugged if the user could edit user-level filters.
eg,
- mail from myself - many spams have a "From" entry that consists of all or part of my username. I'd dump them if I could.
- mail with username or part of it in the subject line - that is rarely, if ever, valid mail.
- mail addressed to domains long passed away, but which were forwarded to a new domain at the time of old domain death. You need an option to dump "mail not to me". OK, you'd need a "friends list" as well to allow legitimate mail not personally addressed (eg from a mail-list) to pass.
These are just a few examples of many variable that I can think of, and while suitable for me, might cause problems for others.
So how about a "filter construction kit" as found in Mailwasher and the like, but to be applied at ISP level. Write your own personalised set of filter expressions applicable only to your account and upload it, or do it on an on-line form. Perhaps make the language a bit more understandable than Mailwasher's
, or like Mailwasher, have available downloadable filter files where the basic hard work has already been done by enthusiasts (or commercial entities who'd sell it - I'd pay!) and all you have to do is tweak it to suit your own username, etc.
It seems basic to me - there must be some reason why it hasn't been done.
AA