SpamSieve does not delete mail that you mark as junk. Depending on your configuration and e-mail software, it moves it to a folder labeled "Spam" or "Junk".
I have been a fan of SpamSieve for many, many years and would encourage you to give it a second chance. Training it really comes down to you marking an e-mail as "spam" or "good". Initially you will have to review the e-mails marked by SpamSieve, but this quantity rapidly decreases.
I concur with Ira. But I would note that it is a powerful tool and like most powerful tools there is a learning curve for its use. In the case of SpamSieve the learning curve is double edged. You have to learn how to use SpamSieve and SpamSieve must learn what you consider SPAM. Spend some time and read the SpamSieve help file before you reject it altogether. One other factor, In Mail SpamSieve flags incoming messages as Spam and what happens after that depends on the settings in Mail.
