> -----Original Message----- > From: Matt Kettler [mailto:[EMAIL PROTECTED] > Sent: February 27, 2006 11:30 AM > To: [EMAIL PROTECTED] > Cc: users@spamassassin.apache.org > Subject: Re: question on training spamassassin > > Webmaster wrote: > > A large number of our clients are using POP. > > If I were to ask them to send false negatives to [EMAIL PROTECTED] and > > false positives to [EMAIL PROTECTED] so I can place them in a > folder and > > train, does that hinder the training process in anyway > knowing that > > the header info is changed with the forwarding process. > > > > Yes...Forwards are more-or-less completely unusable for > training purposes. > > > However, you might be able to get "forward as attachment" to > work, if your mail client supports it. > > > The problem with forwards is twofold. > > First, the headers are completely destroyed. This is a major > problem for SpamAssassin's bayes engine, which studies headers. > > > Second, not only the header info is changed.. The body gets > completely redone. > Mail clients typically add text to the top, and then > re-encode the body text all over. > > If the orignal was base-64 encoded, the forward may not be. > > If the original was multipart/alternative with text/plain and > a text/html, the forward might drop the text/plain, and > create a new one based on the content of the text/html section. > > As far as spam tools are concerned, these messages bear > little resemblance to one another. >
Yes, I thought that may be the case. Thanks.
