Why does my email address keep ending up on the bounce list?

This is the 2nd time I'm having this problem. The email address that I have set up to receive my jotform submissions is a valid email address. It was working just fine, and I was receiving submissions with no problem until suddenly I stopped receiving submissions. Upon logging into my jotform account, I saw a notice that said my email address had been put on a bounce list. I removed it from the bounce list, and the submissions began being delivered again.

My question is why does this keep happening? Like I said, my email address is valid. And this is the 2nd time jotform has just randomly stopped sending me submissions, with no notification!

We're sorry for this inconvenience. 

I checked our email logs and I saw that your email is not in the Bounce list now. Unfortunately, I'm not able to check the reason why it ended in the Bounce list. 

But in order to prevent such issues please check this guide: https://www.jotform.com/help/208-How-to-Prevent-Email-Bouncing-Related-Issues

Also, here is how to check and remove emails from the Bounce list: https://www.jotform.com/help/262-How-to-Remove-Your-Email-Address-from-Bounce-List

If you have any further questions please let us know.

Thank you!