I'm having the same thing with my POP3 email. From looking at the certificate info, I don't understand why my AVG continues to say mail.twc.com is not trusted. I keep having to click the "Acknowledge Exception" button to download my messages.
The certificate appears to have been issued 12-12-2016 and expires 12-14-2017. Don't know why it doesn't want to accept it.
An issue with expired certificates was identified impacting Apple devices. The issue has been investigated and has been resolved . If you are still having an issue, please contact us directly for further assistance.
Please contact us at:
Spectrum-Social Media Customer Care