I have over 200K from the harvest alone.  That is less than a week's worth.  I too need to go through and remove a lot of singles and replace them with Class C entries. I have shut down my "harvester" for the time being so that I can watch the new beta.  In case the beta screws up bad, I don't want a lot of good mail going to the harvester.  Let me know if you want to swap IP blacklists.

Dwight,

I actually took mine off-line due to the following:  I am testing using the Greylist option and many servers initially see the greylisting action (disconnect) as a non-responsive server and pushed up the "food chain" until they hit my dummy SMTP server and then got black-listed.  This was compounded by the scripting I wrote to auto-add the IP's to my dnsbl server.  This caused a huge amount of good servers to suddenly be black-listed by our own server and that just ended up s%*king ... big time.  Up to that point, I had nearly 500,000 IP in my dnsbl with no false positives.

To all that have been using some sort of harvesting method using SF.
I think you may have missed the original point (and in the process made a very good one as well).

The original idea was to create a high number MX record, point it to a dummy smtp that will disconnect the session before it is completed.
Spammer WILL NOT try to resend the message, while 'real' smtp servers will retry based on their setup.

This way, even if your spamfilters are down, real emails will not be lost.
I quite like the idea of harvesting the ip's although my initial main concern was to reduce the load on the secondary MX record.

Happy New Year to everyone!

Stopped using my spamtrap because of the greylisting in the new beta.

Shoot an email to support@logsat.com and Roberto will give you the link.