Andrew, Are you saying that I don't need to install Postgrey? All I have to do is add this to which file- /etc/postfix/main.cf? Kyle, any comment on this? Thanks, Bright
On Tue, Aug 3, 2010 at 3:37 PM, andrew colin <[email protected]> wrote: > > 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/ > > _______________________________________________ > 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. ---------------------------------------
