All of a sudden... sending email is impossible.
I can receive email, but sending email has been completely stopped. NOTHING has changed on my end. What can be the problem? It was working yesterday.... and now today it's not working. All of my settings are unchanged.
The first point of troubleshooting would be to see if the issue resides in your email app or at the server level. You can check this by logging into your InMotion Hosting webmail. If the problem is in your app, you will need to troubleshoot there. For example, if you use Apple's Mail app you may want to contact Apple support. If there's a problem at the server level, you're best advised to check the mail logs for further information. If you're on Business Class hosting, you will need to contact live support for help checking the logs.