Dennis,Do you have an Ironport ESA on that IP? Zertificon.com seems to be a company that makes an SMTP Gateway/email security product. In other words, a direct competitor to Cisco/Ironport. If that is in fact the case, then I am not overly surprised ...
One additional point about senderbase is that it will give a negative score to systems with a magnitude that has recently increased due to the possibility of it being a new spam source or newly infected system. Your IPs are all neutral now but if the...
Yeah, I rememebr that survey. It was several years ago and I remember it being worded a bit vaugely so people may have listed it just as something they use in general. Not sure how it passed the sniff test.The graphical clients are pretty much set up...
It depends on what you want to do.If you just want to force TLS for some domains you can put them in destination controls as TLS Required. Then if there is a failure with TLS the message goes back into the queue just like the remote host was down. Th...