My email again is in the bounce list

My email again is in the bounce list. What is wrong?

If an address is continually being placed on the bounce list, it means that the address is continually rejecting emails sent from our services.  This is usually due to spam filtering, which is what happened in your case.  The specific error was SMTP 550 which is often used to indicate a spam filter has blocked the message from reaching the recipient.

To get around this, you can contact your email provider and have them whitelist our sending IP's:

http://www.jotform.com/help/145-Whitelisting-JotMails-IP-Addresses

Or send the notifications from your own address via SMTP:

https://www.jotform.com/help/244-How-to-Setup-SMTP-for-a-Form