Mine has been doing the same sporadically as well. I have two ISP’s and a domain hosting with another. I had been receiving e-mails regularly all day while on my air-card before shutting it down and heading to my office. When I got to my office I could not get to my e-mails for quite some time. The air-card and the office are the same ISP but different modems.
I have also been getting several notices through the evening on my home ISP’s connection.
Check to see if you have any recent updates on your
firewall. Could be prepping for the 11-9-11 EMERGENCY ACTIVATION. Ooooooo......