Tablet not syncing,

My husband seems to have this issue every 3 months or so - it happened yesterday and although I was able to log into his e-mail online none of his devices (android phone, iPad, laptop and Amazon tablet) would sync. I changed his password online and it finally filtered through the servers to his devices once those passwords had been changed but it took several hours. It might be worth trying that if your mail works online.

Yes my Gmail has stopped too - help.