Emails not being sent

Try to send a message to yourself, so that it will be easier to detect the problem.
Try disabling antivirus software on your computer, which may block the connections to your email servers.
If you are behind a firewall or proxy, ask your network administrator how to configure Email Marketer properly.
Check your server account information - Your email, at the Mailing Accounts window, should be VALID. Most SMTP servers will refuse to deliver messages from invalid or banned senders, also known as SPAMMERS. In this case, try changing your sender data like SMTP user name and password.