Hi, I'd prefer to add this as a comment to the bugzilla entry, but my permissions don't allow ...
I've googled thoroughly for mPOP headers, and it looks as if all non-spam mails originate from mail.ru, so they have a received ... by *.mail.ru header. Though, mailing list software usually deletes these header. This might lead to a meta rule like meta RATWARE_MPOP X_MAILER_MPOP && ! RCVD_BY_MAIL_RU && ! MAILING_LIST But this is probably too unstable for the public. Though, I wanted to share this idea, maybe someone else can improve it. At least in my local configuration it helps ;-) Michael
