notifiers have stopped coming through

It seems our notifiers have stopped coming through, not sure why this has happened and cant work out how to fix it, please help asap!!!

I checked our email logs and some of the notifications being sent to your address, "info@river-green.com", and some of the notifications were being rejected as undeliverable.  When enough were rejected, it caused your address to be placed on our bounce list.  When further notifications were bounced, your address was placed on our email providers suppression list, preventing any further notifications from attempting to send.

I removed your address from both lists and the notifications should attempt to send once again.  I would recommend whitelisting our domains and IP's with your email provider to ensure that this does not happen again:

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