During my to WordPress 2.6.2, I decided to use the default spam plug-in, Akismet.
After a few days of usage, there were still a few trackbacks slipped through, creating additional emails and work for me. So I wasn’t too satisfied and searched for an alternative spam plug-in.
I decided to try WP-SpamFree. So far it has been working great. In fact, I will remove Akismet now and let WP-SpamFree handles all my spamming needs.
Let me know if you have problems commenting, by writing an email at haidong.ji gmail.