On Fri, 13 Feb 2015 20:51:07 -0500 David Mehler wrote: > Hello, > > I've got an email setup which includes Postfix as MTA, Amavisd-new as > content filter, Spamassassin for antispam work, Dovecot for Imap > services, all of which with the exception of Amavisd use a Mysql > database. Mail delivery, virtual users, and Dovecot with Sieve for > moving spam in to a dedicated user-specific spam folder, all work > fine. What does not work is Spamassassin retraining on a false > positive or negative, I'm using the Dovecot antispam plugin. I'm very > frustrated as I've googled this and asked on the Dovecot and other > lists, and am getting nowhere.
It you post what what you've tried, someone may be able to put you right. I don't use the plugin myself, I don't think it's well suited to spamassassin. It's also questionable whether users should be able to train a global database directly. You've not mentioned how you established it's not working. > What i'd like to happen is moving a message into or out of a user's > dedicated Spam folder will retrain SA indicating it's either a false > positive or negative The problem with this is that you are training on error based on the SA overall result, not the Bayes result. This results in Bayes adapting needlessly slowly to spam, and often nowhere near enough ham being learned. Bayes doesn't even turn-on until it's been trained with 200 spams and 200 hams. Personally I wouldn't expect 200 FPs in a lifetime (let alone the thousands that are needed for a mature database). Even on a global database it may take a while for Bayes to turn-on without some additional training. You can supplement it with autotraining, but you become much more reliant on users retraining misclassifications. Doing some extra manual training is better. > and also in the case of a false positive or > negative modify the subject line of the message to either add or > remove the **spam** addon. If you're filing spam into a separate IMAP folder, do you need to rewrite the subject in the first place? It doesn't seem to do anything useful and it probably makes spotting FPs harder.
