On Tue, Mar 29, 2005 at 04:23:05PM -0800, Andreas Stollar wrote: > Hi List, > > I noticed that some spammers have found a workaround for the sanitycheck > in qmail-smtpd. I most cases it works just fine, e.g. > > 220 mail0.speakeasy.net ESMTP > helo > 250 mail0.speakeasy.net > mail from: user > 554 mailfrom without @ is administratively denied > > But if I don't give it anything, it accepts the mesage, this is not good. > > 220 mail0.speakeasy.net ESMTP > helo > 250 mail0.speakeasy.net > mail from: > 250 ok > > -- or -- > > 220 mail0.speakeasy.net ESMTP > helo > 250 mail0.speakeasy.net > mail from: "" > 250 ok > > I am not able to adjust the regext rules in qmail-smtpd.c, but I am > hoping someone will know how to solve this problem. >
You NEED to accept mails with empty sender address. That's how bounce messages are sent. I know a few spammers abuse the emtpy sender but you can not block just because of that. -- :wq Claudio
