I have gotten tired of spam. I’m currently running spamd from OpenBSD as well as SpamAssassin and SpamBayes, and still dozens of messages a day manage to get through.
So I’ve installed a confirmation system. If you email me, and you’re not already in my database-o-people-I-want-to-email-me, my mail system will not deliver the mail, but send you a message asking you to confirm your identity. Once you do so, your original message will be delivered. You will only need to confirm once.
Some people do not like this, but I’m getting totally fed up.
Test.
And again.