> I need some help. > Right now we are using greylisting / spamassasin / antivirus and so on, > but, now spammer are gentting really more "smart": > if a spammer use a real SMTP bypass the greylist, and if the mail is well > formatted it may by-pass also the spamassasin. > It's quite normal, but the point is, if a large number of email are send to > a non existing user these email are processed and only at the end a mail > form MAILER DEAMON is send for a not existing user... so a lot of mail, more > than 2500 in some server a day, are processed... and in some case the queue > is really overloaded.
Hi Andrea Yes, we're experiencing this too. I think this phenomenon is known as 'backscatter'. See: http://www.postfix.org/BACKSCATTER_README.html and http://www.hispalinux.es/~data/postfix/ HTH Have a great day! Stuart -- Then you will know the truth, and the truth will set you free. _______________________________________________ This mailing list is hosted and supported by bit-heads GmbH | http://www.bit-heads.ch _______________________________________________ Web-cyradm mailing list [email protected] http://www.web-cyradm.org/mailman/listinfo/web-cyradm
