Why I keep getting a message about my email address in your bounce list? Its been my address for years and is valid

ehag15@hotmail.com

Your email address has been added to our bounce list due to the following reason: 

Reason(s) : smtp; 550 SC-001 (COL004-MC2F33)

An email address is added to our bounce list due to several reasons, may be the destination server email was not available at the moment and the email could not be properly delivered; however, I would suggest you to check the following guide in order to avoid bouncing issues: https://www.jotform.com/help/208-How-to-Prevent-Email-Bouncing-Related-Issues 

You could also remove an email address from our bounce list by following this guide: https://www.jotform.com/help/262-How-to-Remove-Your-Email-Address-from-Bounce-List 

You may also add our senders to your contacts list, this would help to reject emails from JotForm, our default senders are noreply@jotform.com and noreply@formresponse.com. 

Hope this helps.