Problem with Distributed form via email, completed form stuck in senders email outbox
I created a form and Distributed it via email to a few test email addresses here at the office. The user was able to fill out the form as expected. When the user went to "Submit Form" (or something), 2 of the 3 users, all on Outlook, got this message:

These users don't have a special configuration that keeps their email in the outbox for any reason.
I plan to send this to around 600 customers that are not techincal users.
Thanks in advance for your help!
Lori
