On Wed, 22 Dec 2010 20:23:51 +0200 Razvan Chitu <[email protected]> wrote:
> *For* non-existent or *From *non-existent? > I never knew that Postfix had a reject_unknown_sender. Does it have > any caveats that I should watch over? I wrote "for", which is what I meant and is why you get on backscatter lists..... > > Thanks, > C.R. > > On 12/22/2010 7:53 PM, John Peach wrote: > > 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
