Postfix which the user has already has a built in mechanism to stop that dictionary like delivery, you do not need greylisting for that.
smtpd_error_sleep_time = 5s smtpd_soft_error_limit = 10 smtpd_hard_error_limit = 20 Most spammers do not use systems under their own administration so why would they care if the mail queue filled up ? On Tue, Aug 3, 2010 at 1:42 PM, Kiggundu Mukasa <[email protected]> wrote: > > Grey listing works because its a pain in the arse of spammers > I have used it and it works very well > > Agreed that any decent smtp implementation will resubmit > BUT > imagine you are trying to deliver tens of millions of messages and they are > just queuing up because of retransmission > > On more than one of the servers I control I have seen spammers sending to > every name (in alphabetical order) in the english language. > so you can get > > [email protected] > [email protected] > [email protected] > [email protected] > etc > etc > etc > until > > [email protected] > > Imagine they are doing that for many domains > > That type of spammer cannot afford to be told that for each delivery wait > for 5 minutes ....they hardly ever resend. > > Kiggs > > > > > On Aug 3, 2010, at 1:25 PM, andrew colin wrote: > > Greylisting is a brain dead idea any decent smtp implementation will > not be detered from resubmitting, +1 for spamhaus. I say go > spamassassin, kaspasky never worked for us too. Block most stuff at > MTA level using RBL, reverse DNS checks, sane security signatures, > then scan only stuff that got through those checks. > > On Tue, Aug 3, 2010 at 10:43 AM, Kyle Spencer <[email protected]> wrote: > > Bright, > > > I recommend using a technique called "greylisting" combined with a > zen.spamhaus.org RBL check. This will effectively kill 95-99% of your > spam with no danger of false-positives. > > > Greylisting on a Postfix system can be implemented with a package called > "postgrey" and the zen.spamhaus.org RBL is a config line change or two > away. > > > Here's links to some how-to's: > > http://www.komaii.com/linux/postgrey-on-SuSE10.2/ > > and > > http://www.spamhaus.org/zen/ > > and > > http://wiki.debian.org/Postfix#anti-spam.3AUsingRBLLists > > > There are probably better tutorials around since I just picked the first > reasonable looking one on Google, but give it a try and let us know if you > run into problems. > > > Regards, > > Kyle Spencer > > > ----- Original message ----- > > Hello Everyone, > > Is it OK to run Spam Assassin along side Kaspersky Anti Spam? How > > effective is Spam Assassin? My mail server is being bombarded with > > alot of spam. I am currently using Kaspersky Anti Spam but it seems > > not to be doing a good job. > > I use Postfix as my MTA on OpenSuSE 10.3. I need a solution, any ideas? > > Thanks, > > Bright Onapito > > "-If you want to see change, then be that change." > > _______________________________________________ > > LUG mailing list > > [email protected] > > http://kym.net/mailman/listinfo/lug > > > LUG is generously hosted by INFOCOM http://www.infocom.co.ug/ > > > All Archives can be found at http://www.mail-archive.com/[email protected]/ > > > The above comments and data are owned by whoever posted them (including > > attachments if any). The List's Host is not responsible for them in any > > way. --------------------------------------- > > > > _______________________________________________ > > LUG mailing list > > [email protected] > > http://kym.net/mailman/listinfo/lug > > > LUG is generously hosted by INFOCOM http://www.infocom.co.ug/ > > > All Archives can be found at http://www.mail-archive.com/[email protected]/ > > > The above comments and data are owned by whoever posted them (including > attachments if any). The List's Host is not responsible for them in any way. > > --------------------------------------- > > > > > > > -- > "Dru" > To follow the path, look to the master, follow the master, walk with > the master, see through the master, become the master. (zen) > http://www.topdog.za.net/ > http://www.baruwa.org/ > _______________________________________________ > LUG mailing list > [email protected] > http://kym.net/mailman/listinfo/lug > > LUG is generously hosted by INFOCOM http://www.infocom.co.ug/ > > All Archives can be found at http://www.mail-archive.com/[email protected]/ > > The above comments and data are owned by whoever posted them (including > attachments if any). The List's Host is not responsible for them in any way. > --------------------------------------- > > > > Sincerely, > > > > > *Kiggundu Mukasa* > > SERVAL LTD. > Plot 80 Kanjokya Street > P.O. Box 24284 Kampala, Uganda > Tel: +256 772 972255 > +256 414 571779 > Fax: +256 312 262122 > > http://serval.ug > > > > _______________________________________________ > LUG mailing list > [email protected] > http://kym.net/mailman/listinfo/lug > > LUG is generously hosted by INFOCOM http://www.infocom.co.ug/ > > All Archives can be found at http://www.mail-archive.com/[email protected]/ > > The above comments and data are owned by whoever posted them (including > attachments if any). The List's Host is not responsible for them in any way. > --------------------------------------- > > > -- "Dru" To follow the path, look to the master, follow the master, walk with the master, see through the master, become the master. (zen) http://www.topdog.za.net/ http://www.baruwa.org/
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_______________________________________________ LUG mailing list [email protected] http://kym.net/mailman/listinfo/lug LUG is generously hosted by INFOCOM http://www.infocom.co.ug/ All Archives can be found at http://www.mail-archive.com/[email protected]/ The above comments and data are owned by whoever posted them (including attachments if any). The List's Host is not responsible for them in any way. ---------------------------------------
