[Greylist-users] Identifying ill configured relays from expired records

[Paul Davies]

Hello All,

We have been running Greylisting since mid December 2003 on multiple 
MX's with a centralise Database, and are currently very happy with the 
results...
Spam has been reduced from about 50% to around 10% (when implemeted on 
all MX's)
    We have about 2500 users...
    Currently are on about 2,500,000 id...
    Dumping about 30,000 to 40,000 expired records a night

But we have over this period identified some ill-configure relays out 
there which we have had to "whilelist" , yahoo etc .... Currently ~45 
whitelisted servers...

Has anyone done any work on trying to identify valid MX's that require 
whitelisting from the database contents... Since we are still concerned 
about not receiving valid mail....


Cheers,

Paul