I have thousands and thousands of entries for 66.94.225.* everyday (actual example, 66.94.225.191)
It traces back to yahoo, and that ip appears on no spam lists.
So is this a valid yahoo ip used for maybe their yahoogroups and other internal products? Or is this an outside mta used by their clients? I have run across this problem with AOL, an aol ip used for nothing but a dictionary attack.
For example, just last night I had in the SMTPD Errors section of reports, Invalid User IP listed for about 60 of the ips in that c-block, and they resulted in over 5,000 attempts, all erring out. Do they just not handle bounces well? If i block that c-block, will it come back and haunt me?
Thanks
Chet
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