1. Check the internet connection – reconnect if necessary.
2. Restart your device.
3. Check your email account settings – check for any typos or misconfigurations.
4. Clear the cookies and cache on your browser.
5. Check the email servers for any outages.
6. Clean or update the security software (antivirus, malware, etc.).
7. Disable or enable any plugins that may affect your email account.