How to fix the issue with not receiving emails (I can't send emails)

Make sure that your computer is connected to the Internet. Type any address (e.g. Google, Yahoo, etc.) in a web browser to check if you have access to the Internet.

If the page are not loading at all and you receive a "No Internet Connection" message of any kind, you need to try to reconnect to the Internet.

If you are still unable to go online, check out the No Internet Connection solutions.

Check if other programs that are running on your computer or mobile device prevent your email client from doing its tasks.

Usually, anti-virus software block email clients in order to protect you from online threats. If you have an antivirus software running, disable it and then check if you are able to receive emails, by sending yourself an email from another account or asking a friend to do that for you instead.

If this solved your issue, you can "tell" the antivirus software to stop blocking your email client via its Settings menu, or you can change the email software's (client's) settings.

If you are connected to the Internet, but you receive error  message "Connection timed out" (meaning it cannot be established), it is possible that your email provider is experiencing a service outage (too many emails have been sent at the same moment or some other similar problem).

The only thing you need to do is to wait until servers are up and running again.

Search for their status web page (of the email you are using) in your web browser to make sure their service is online. You can find more info on Downrightnow.