I sent an email to QVC and below is the response I received. I just made the change to my account and I started getting email again today. I'm sending the response just in case others stopped receiving emails and want to get them again.
Thank you for emailing QVC.
I am sorry for the trouble. To subscribe to our e-newsletters, simply click
on the site greeting, "Welcome" or "Hello..." at the top right of the
QVC.com Homepage. Select "My Account" from the dropdown options. Sign-in to
your account and select "Email and Mobile Preferences" under the
"Communication Preferences" heading.
Once you've logged into your account, you can choose the e-newsletters
you'd like to receive. You're welcome to make changes to these preferences
anytime.
It has been a pleasure assisting you. Thank you for shopping with QVC!