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JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.

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We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.

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    Blocked/Black Listed E-mails

    Asked by wigginsray on July 20, 2016 at 12:48 PM

    I created an e-mail address of aecequipmentsales@acscorporate.com. I tested this thoroughly, and it was working fine. Out of the blue, it is "bounce" listed by your website. I want to know exactly why. We rely on these e-mails for receiving business referrals and can't have our e-mails being randomly blocked. Please turn this feature off or explain why this happened so we can avoid it.

    Page URL:

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    Answered by victor on July 20, 2016 at 01:37 PM

    Sorry for the inconvenience. I have just reviewed the email in question and did not find it in our bounce list. I am assuming that you have already remove it. Once the email is removed from the list there is no way to know why it was placed there in the first place.

    You can view our users guide:

    How to Prevent Email Bouncing Related Issues

    You can also try adding our IP to your email servers whitelist

    Whitelisting JotMails IP Addresses

    If this occurs again, please let us know before you remove it from the bounce list. We will be glad to review and advice you better.

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    Answered by wigginsray on July 20, 2016 at 04:20 PM

    Great. It JUST happened again. Please check on this ASAP so I can remove it from the bounce list. My e-mails should be going on the bounce lists.

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    Answered by victor on July 20, 2016 at 04:35 PM

    Thank you for indicating this. I have just reviewed your email and it is located in our bounce list because:

    Reason(s) : smtp; 550 Rejected by header based manually Blocked Senders: noreply@jotform.com - https://community.mimecast.com/docs/DOC-1369#550

    I have remove it and you should be able to receive notification now. I also reviewed your ACS form and it seems that your notification is properly configured. If you are still having problems, you may also try changing the sender email address and use your own email server to send out notifications.

    How to Setup SMTP for a Form