Hopefully, most people are using the bayes system in the spamassassin these days (or just gmail); so, hopefully your "newsletter" gets filtered properly anyway.

UPDATE: I'm sad that I used the word twice like that. I'm also sad that the state of email today means that a high percentage of legitimate mail is blocked in the effort to block spam. However, I do find it rather unlikely that a legitimate mailing would need to spend so much time tweaking the scores. If it does, then the spamassassin isn't doing the job it promised — so perhaps it is doint it's job.