[Plugin: Contact Form 7] Error sending forms with user entered destinations

I have a bunch of forms that are no longer able to send emails based on a user entered email addresses. The forms I have ask for the user to enter an email address and upon submission it’s supposed to send an email to the user based on what they entered in the email field. A couple weeks ago our hosting company made a changed that killed the form email functionality on our site. In order to fix it I had to install the WP-Mail-SMTP plugin. This resolved our issue of sending emails. Then today I find out our form system no longer sends out emails to user entered email addresses. I’m not sure if the WP-Mail-SMTP plugin killed it or if it’s an issue with our host. They are unwilling to assist in this so I’m on my own to find a solution.

Here is my form markup:

<p><b>Name:</b><span style=”color:#FF0000″>*</span>
[text* your-name]</p>

<p><b>Email Username:</b><span style=”color:#FF0000″>*</span>
(email username must be your school email username)
[text* your-email 15/25]@[select staff-stu “stu.aii.edu” “aii.edu”]</p>

<p><b>Authentication Question:<span style=”color:#FF0000″>*</span></b>
[quiz quiz 1/1 “2+1=?|3” “1+1=?|2” “3×1=?|3” “0x0=?|0”]</p>

<p>[submit “Send”]</p>

It then Sends based on this:

To: <[your-email]@[staff-stu]>
From: [your-name] <[your-email]@[staff-stu]>
Subject: Gnomon Login Info

I’m kinda stuck here. Any ideas our there?