[H-GEN] People's thoughts on Greylisting

Bruce Campbell bc at humbug.org.au
Fri Nov 25 10:03:57 EST 2005


For those looking after mail servers, or even have a more than passing 
interest in the amount of spam in your inbox, this subject may be for you. 
You may have heard of, or implemented it before.

For those who don't know what it is, Greylisting is a method of delaying 
the acceptance of email at the SMTP level to ensure that only 'real' email 
is received by the server, and works because SMTP has an inbuilt retry 
mechanism after a server receives a temporary failure from a remote site.
'Unreal' email doesn't get through because the senders of such crud 
generally don't bother to retry sending the mail.

Have people used it or encountered it?  What are your thoughts on the 
method or implementations that you have seen ?

--==--
Bruce.

A more complete description can be read at http://www.greylisting.org/






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