postfix header/body checks logs

[primal23]

Is it possible to change where the results of these are logged to? mail.log gets quite full, and I would like to be able to see the results of filters if it is possible w/out having to read through a ton of text.

[primal23]

Also was wondering if there was a way to replace a profanity with a **** and not replace the entire email? I tried an email with the filter on, put in a couple sentences with a profanity, and when it was passed through all the email had was **** and not the rest of the text.