I have set email account in CPanel. I am login webmail by email address and password set in CPanel, but login failed. Tell me how to login ?
Enter the right username and password? Make sure you use the email account credentials, not your hosting account credentials. And watch out for copy-pasting whitespace.
I just created an email account on your hosting account and I was able to login without any problem. So the only explanation I can think of is that you did not enter the right login details.
I create another account and it opens. Thanks!