On Wed, 22 Dec 2010 19:52:03 +0200 Razvan Chitu <[email protected]> wrote:
> Hello again, > This time the question is simple: my server is being maliciously > used to send spam, and this has to stop. Here are the log entries in > question (latest ones): [snip] > Also, I'm having a lot of these kind of entries lately (*Dec 22 > 19:03:18 raptor postfix/qmgr[23830]: 42B741BC5C9: from=<>, size=3425, > nrcpt=1 (queue active)*) with unknown sender. Unfortunately these > bounces are what put my server on several backscatter lists. Is there > any way to reject these kind of senders "<>" from start > (reject_unknown_sender?). Is there any way to insert longer and > longer delays for unauthorized connections such as the ones from > 88.166.185.164 with each connection attempt? Something like proftpd's > throttle module. > > Thank you and be kind. Point me to the right manual :)) Stop accepting mail for non-existent users. > > Kind regards, > -- John
