Maybe your email address "refuses" to receive emails.
To test and resolve this issue, try sending an e-mail from another account (account A) to your own account (account B) and see what happens.
Did the e-mail message bounce (failed to send)? If it did, you will receive a return message, on account A that the delivery wasn't successful, as well as possible reasons for that.
You can also check your e-mail address's validity here.
If your email address is valid and it still "refuses" new emails, check out the emails don't get delivered / bounce solutions.
If you have entered incorrect login details, or if you have changed your password but you have forgotten to update the login details in the email app or web browser, you definitely won't be able to receive emails.
Make sure that you are using correct account credentials and carefully type your username and password to log in.
Also, make sure that you have entered the correct details for the:
Note: Make sure to check/tick the My SMTP server requires authentication check box.
If you have recently registered or transferred a new domain, allow 24 hours for the domain to propagate. After propagation is complete, your email will be accessable again.
If you don’t receive the email in the next 2 minutes please check your junk folder, and add [email protected] to your safe sender list.