Solved: Sky email with Android tablet "Cannot safely connect to server"
Solving connection issues with Sky.com email on a Huawei Mediapad T9 Android Tablet / Phone by following these steps. In particular the "Cannot safely connect to server" message which is all to do with the Security type which has to be set to SSL/TLS (Accept all certificates).
Username: this is your sky email address eg. firstname.lastname@example.org
Password: the sixteen character password from your Sky account: go to My Details / Sky Yahoo Mail access - Manage passwords
Server: Set this to imap.sky.com
Tap the Security type arrow and select SSL/TLS (Accept all certificates)