Hi!
The reason I posted here and I believe it is relevant because it might be against SURBL nameservers and I'm hoping to hear if others are seeing the same issue.
Lots of SMTP connections to your mail server doesn't indicate an attack against the SURBL name servers. I've not seen any major traffic changes in the last week on my NS.
Unless the mailbox and DNS are one and the same machine ;)
But same as you noticed, no jump in traffic here either. So must be something different.
Bye, Raymond.