I was going through my top opener/clicker domains in OnPoint and noticed my #1 clicker IP was 64.235.144.50. It traces back to mail.ess.barracuda.com. I would think it would be smart to block this IP, but am I going to disrupt delivery to other legitimate domains if I do so?
I've found if you block bots you may hasten a listing on whatever blacklist they scrape content for.. With barracuda, it could be one of your recipients forwards mail to a barracuda hosted domain.. Their software has the habit of scanning the content of the message and visiting the links to check for virii, trojans, etc.. It's a similar MO to Mcaffeee, symantec, etc. Your best bet would be to setup some content filled sites to send them off to.. You could even be more devious and use a reverse proxy like nginx and serve up content from major sites.
Also block 12.200.95.45. It's another barracuda clicker ip. If you redirect them elsewhere, you can delay/avoid barracuda listings. I know that's not an option in onpoint, so I guess blocking it is the next best thing. At least you'll keep those addresses out of your clickers that aren't really clickers.
