Please note, that some mailservers has a default timeout of 30 seconds for smtp connection. So if you go to delay the HELO/EHLO message for 30 seconds, you will probably block legitimate mails, because the sending server will disconnect, caused by his timeout settings.
Patrick -----Ursprüngliche Nachricht----- Von: swinog-boun...@lists.swinog.ch [mailto:swinog-boun...@lists.swinog.ch] Im Auftrag von Daniel Kamm Gesendet: Dienstag, 20. Oktober 2009 10:39 An: swi...@swinog.ch Betreff: Re: [swinog] Greylisting Stanislav Sinyagin wrote: > last AprilMartin Blapp has presented a nice concept at SwiNOG: > > instead of greylisting, the SMTP server delays the first OK response to > HELO/EHLO > for 30 seconds. That is usually enough for the vast majority of spambots to > give up. On a heavy traffic mail server, you probably run into a max session problem when you try to hold many idle connections for 30 seconds. - Dan _______________________________________________ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog _______________________________________________ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
