apache wiki ylhrixqhcapacheorg dear wiki user subscribed wiki page wiki category spamassassin wiki change notification following page changed justinmason httpwikiapacheorgspamassassindontblockthebat comment change come several times make faq new page dont block bat lot spam claims useragent xmailer header come program called bat may appear attractive block however bad idea httpwwwritlabscomenproductsthebat bat legitimate email client like outlook eudora often falsely impersonated spamware generally advisable spammers fake header look like real mail client best makes spam detection harder spamassassin tag score messages claim bat tell isnt really obviously false outlook xmailer headers fact bats development team helpful regard providing lots good tips ways tell real bat mail fake stuff mattkettler put reality nearly spam generated custom software runs background infected pcs botnets think mail viruses infected pc first place generate emails spread spamming activity simply good reuse code spam probably generated fragment code storm worm mydoom bagel etc possibly glued together code differing payload needs spammer going foolish enough put useragent storm worm botnet v 3120 dream wed 06 aug 2008 172551 0000 spamassassin wiki update dontblockthebat justinmason