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Old 03-01-2006, 01:39 AM   #1
Registered: Aug 2004
Location: Jaipur(Rajasthan), INDIA
Posts: 35

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Stop Spam


I m managing a sendmail server....I want to stop some domaind to send mails to us.... Do we have an online database that we can use( & how to use) ...and any mail coming in will check whether the mail is from a domain listed in the database and reject or permit accordingly.... OR can we have a database that we can download and it also provides regular updates regarding domains that send spams...We could hace managed the database locally... but the number of domains could be huge... and moreover no one is aware of all the domains... ...HELP !!!
Old 03-01-2006, 03:00 AM   #2
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Registered: Aug 2001
Location: Fargo, ND
Distribution: SuSE AMD64
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Just ask your friend Google with the terms: spam domain blacklist
Old 03-01-2006, 07:11 AM   #3
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Registered: Aug 2002
Location: Stuttgart (Germany)
Distribution: Debian/GNU Linux
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We have successfully reduced spam to < 1% with the following setup:
  • greylisting
  • checks for invalid sender/recipient domains, HELO restrictions, etc
  • SpamAssassin
Old 03-01-2006, 08:43 AM   #4
Registered: Nov 2003
Location: Chittagong, Bangladesh
Distribution: RHEL 5
Posts: 63

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Hi P Test,

try following lines at the last of ur file

FEATURE(`dnsbl', `', `"550 Mail from " $`'&{client_addr} " refused - see"')dnl
FEATURE(`dnsbl', `', `"550 Mail from " $`'&{client_addr} " refused - see"')dnl
FEATURE(`dnsbl', `', `"550 Mail from " $`'&{client_addr} " refused - see"')dnl
FEATURE(`dnsbl', `', `"550 Mail from " $`'&{client_addr} " refused - see"')dnl
FEATURE(`dnsbl', `', `"550 Mail from " $`'&{client_addr} " refused - see"')dnl
FEATURE(`dnsbl', `', `"550 Mail from " $`'&{client_addr} " refused - see\#why_rejected"')dnl

here is some example database ,,, ,

u can find more databses through googleing and just use that database with another line. just follow the above lines starting from "FEATURE" and end with "dnl"

dont forget to

m4 /etc/mail/ > /etc/mail/

after editing ur file

Last edited by orko; 03-01-2006 at 08:47 AM.


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