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What email is it? What problem symptoms do you observe happening, please?
On what platform (Windows PC, or Apple computer, or handheld device of Apple iDevice or Android smartphone type) is it happening?
I'm sorry to hear that.
What happens when you tap on the app that allows you to view your email?
Can you sign in to your email account and view emails, even if not recent emails?
And, can you see any recent emails, or none since a certain time and date (if you can see any emails) ?
Did you change your email password ***** at the library?
Then you need to change your email password, for your email account, as stored in your email app on your handheld.
And, what app do you use to access email?
If it seems to have no name, you will need to access its settings. E.g. at the upper right, the triple-bar icon perhaps, after you have opened the email app.
Change the stored password ***** your email account, there in the settings in the app.
Restart your Android phone.
Be sure you changed *all* stored passwords for both Read-ing email, and for Send-ing email, for your account configuration on the Android phone, and that should make it work, if the stored passwords are the new password, to the letter, and observing UPPER-CASE and lower-case distinctions.