Mark Sapiro sent the message below at 06:08 PM 1/19/2007: >Kelly Jones wrote: > > >One of my users added this as a spam filter: > > > >^x-spam-flag:.*yes > > > >(all lower case since spamfilter regexps are case-insensitive-- > >hyphens not backslashed by accident), > > >It doesn't matter. '-' has no special meaning.
In this case, that is correct. The hyphen DOES have special meaning in a character class such as [0-9] which will match all numerals. > >and the list started dropping > >ALL emails. Why? > > > >We're running SpamAssassin on another box (mail gets forwarded to the > >"mailman box" after SpamAssassin is done with it), and I've confirmed > >that SpamAssassin is running properly and not setting "X-Spam-Flag: > >Yes" across the board. > > > >Even with the forgot-to-backslash-hyphens error, why would that regexp > >match the headers of every message? > > > >We tested this and it's repeatable: with that regexp as a spam filter, > >emails are dropped-- when that regexp is removed, emails go through > >properly. > > >I don't know. There are cases of people using > >^x-spam-status:.*yes > >and having it match > >X-Spam-Status: No ... tests=BAYES... Which is to be expected because .* means "match anything 0 or more times". A safer construct there would be to use something like this which will match only whitespace between the : and yes. ^x-spam-status:\s*yes >but X-Spam-Flag: should be just yes or no. In fact, I think by default >it is just > >X-Spam-Flag: YES > >or not present at all. I believe this is correct. I also believe the default is no header if not detected as spam. >I haven't looked at this to see if it is actually a possible cause, but >the regexp box in header_filter_rules is a list of regexps one per >line. If it contains an empty line or a 'blank' line, that might be a >regexp that will match anything or any blank. Don't type a new-line >after the regexp. Well, I think it would indeed result in an empty pattern which would match everything. Sounds like you may have hit the cause. Dragon ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Venimus, Saltavimus, Bibimus (et naribus canium capti sumus) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq01.027.htp
