Cant sign in to my e-mail

[Klb1]

Hi every so often when I go to check my e-mail it say can't sign in I've not changed my password, why does it keep doing this ?

[strawberry cake]

Hello!

May I know where are you opening your email please?

Is it via an app or web browser?

Thank you.

[strawberry cake]

Hello! 

If you're using a Samsung default email app, you can try removing the email and adding it again.

Please head to Settings > Clouds and accounts > Accounts > tap your emai > (remove and re-add).

If you're using a web browser like Samsung Internet browser, Google Chrome or other web browser to open your email, you may try other web browsers that are not in use (or if you could download one), if the error persists, please contact your email provider, this could be their server error.

Thank you ^_^