If the link no longer works, manually search for “Microsoft root certificate update for Windows Phone” on a PC and sideload the CAB file using the Windows Phone Recovery Tool.
| Setting | Value | |---------|-------| | Incoming server | imap.gmail.com | | Port | 993 | | Security type | SSL/TLS | | Outgoing server | smtp.gmail.com | | Port | 465 | | Security type | SSL/TLS | error code 800c0005 windows phone