Nathan Huesken schrieb: > Hello, > > I am just switching to postfix for my mailserver. > I wonder, if and how the following is possible: > > I have a catchall for a certain domain (lets call it catch-all.com). > But certain addresses (like i...@catch-all.com) just get to much spam. > So I want to block them! > But I do not want to bounce them, it causes to much traffic. I want to block > them on the smtp level. > If someone sends an mail to i...@catch-all.com, he should get an "user not > found" response. > > Thanks! > Nathan
Hi Nathan, i wouldnt recommend any kind of catch all these spam days however you alway can use a recipient reject i.e smtpd_recipient_restrictions = ... check_recipient_access hash:/etc/postfix/recipient_access_blacklist, .... /etc/postfix/recipient_access_blacklist i...@catch-all.com REJECT this mail adress doesnt accept incomming mail be aware that you might not recieve any bounces etc this way ( dont know if this is ok at your site ) you might use other sender tables before this rule ( perhaps using smtpd_restriction_classes ) to make bounces work for typical bounce senders like i.e <>, postmaster etc ( on the other side these addresses often are backscatter source or spam faked ) so there is no "Gold" way reject as many mails you can by other rules before this rule by i.e rbls, unknown domain checks etc stuff like this depends deeply on amount and kind of incomming spam and backscatter mails and may changing during runtime by analysing logs using real mailaddresses only, instead of catch all ist better anytime anyway -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
