I'm not sure I understand the question here. Are you looking for a way to stop spammers who are sending messages that appear to be "from" your domain? That's very difficult. SPF is probably your best bet and it's certainly not perfect.
If you're trying to stop spammers who are using your mail server to send spam, that's a configuration issue. Both spamdyke and qmail are able to prevent relaying if they're configured correctly. -- Sam Clippinger ramalingam m wrote: > Dear all, > If possible can you tell me what configuration should i have to to to > prevent spammers using my domain for relaying which should be done > for avoiding spam i.e. i heard in smtp authentication mail from other > domain can reach us when they send from browser or outlook express(any > mail client) but if they want to send via mail client using our mail > domain(relaying using other domain spammers do) then they would have > to to do smtp authentication is it possible over here. > > On Thu, Jul 16, 2009 at 8:23 AM, Sam Clippinger <[email protected] > <mailto:[email protected]>> wrote: > > Maybe. Are you suggesting it's just a delay to see if the sender > blasts > everything out, like the filter to catch earlytalkers? 120 seconds > seems like an amazingly long time for that kind of test, if it's > deliberate. I would expect a lot of clients to timeout before 120 > seconds (I think the default for Outlook Express is 90 seconds). Even > if they didn't timeout, a busy server could easily run out of > resources > with lots of remote connections just hanging open like that. > > Without more information, my gut tells me it's probably an error on > their end. Something (e.g. rDNS, authentication, recipient > validation) > is taking a long time to finish or timeout, which is causing a delay. > > -- Sam Clippinger > > Ulrich C. Manns wrote: > > If i send an email to a mirapoint messaging server > > (http://www.mirapoint.com) the communication stops for 120 seconds > > after i send /rcpt to:.... > > / > > Maybe this is an additional test before greylisting? Something for > > Spamdyke 4.0.11? > > > > Regards, > > Ulrich > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > spamdyke-users mailing list > > [email protected] <mailto:[email protected]> > > http://www.spamdyke.org/mailman/listinfo/spamdyke-users > > > _______________________________________________ > spamdyke-users mailing list > [email protected] <mailto:[email protected]> > http://www.spamdyke.org/mailman/listinfo/spamdyke-users > > > ------------------------------------------------------------------------ > > _______________________________________________ > spamdyke-users mailing list > [email protected] > http://www.spamdyke.org/mailman/listinfo/spamdyke-users > _______________________________________________ spamdyke-users mailing list [email protected] http://www.spamdyke.org/mailman/listinfo/spamdyke-users
