Email Error: 451 qq temporary problem (#4.3.0)
I am using Outlook 2010 and pop3 to access my email from Network Solutions. During the past couple of days, I have begun to receive an Email Error pop-up: "451 qq temporary problem ((#4.3.0)" from Norton Internet Security. People are not receiving my messages and it's taking a long time for me to receive messages for others, if at all.
In a different post, someone from Symantec suggested turning off the outgoing email scan in NIS. I did that, but all that has done is stop the error message pop-up and the email problems continue.
My assumption is that Network Solutions is having problems on their end, but since the error is so generic and nondescript, I can't tell for sure. When I search Help for 451 qq, I find nothing.
Can someone please tell me what that error means?