Spam is always a problem. It’s a problem for everyone. Blocking it is also a problem. You can lots of the time have false positives. Which gets annoying. Also when your anti-spam doesn’t block enough. Or when it gets in your way. Maybe it doesn’t even work with your specific software.
I have spam problems too. SpamAssassin is the most well known open source mail-based anti-spam solution. The developers behind SpamAssassin need your help. They need you to submit “ham” and “spam” mail in order to teach SpamAssassin to recognize new spammer techniques.
Check the project out at this wiki page.