[EMAIL PROTECTED] wrote: > On my original suggestion, would it be worth blocking messages where there > is either no plain text or it differs signicantly from the HTML in terms > of blocking spam?
Two questions: 1) Should we block messages that contain no text/plain parts? I would say no. There are some people who only send text/html with no corresponding text/plain. There are also automated e-mailings that only contain text/html. So blocking mail for not having a text/plain would lead to false positives. However, I would strongly suggest blocking mail that lacks a text/* part entirely. We've seen some image spams where the top-level MIME type is image/gif. It's very hard or impossible to create such messages with most MUAs; they need to be crafted specially. 2) Should we block messages where the text/html differs "significantly" from the text/plain? In theory, yes, but measuring if the difference is "significant" is nightmarish. SpamAssassin has some rules that take a stab at it, but they're not all that good. Regards, David. _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
