Phishing Account Renewal

I have received two very legitimate-looking emails from "Norton" telling me that in order for my auto-renewal to occur, I must update my  account  information.  Not trusting the links in the first email, I went directly to the Norton site to check my account, and everything including the credit card is totally up to date. I received the second one today.  Could this be phishing or is it legitimate and I'm missing something?  I'm saving the email with full headers.

Ted