All emails are gone.

At 4:00 a.m. today, I read my emails. Then again at 7:30 I checked again and all emails are gone--folders, trash, inbox--everything. I did receive a message that the Comcast server failed. All I have now, are 10 emails I received since 7:30 a.m. What's happened with Comcast? I have a gmail account and all emails are present. This is a major problem--I have tax emails, home improvement, etc.

Thank you,