Using an "E-Mail" Field as "From Address" Without Mandrill

I apologize in advance if this question has already been answered.  I looked through the forums but could not find an actual answer to this question.

Due to the changes at Mandrill where it is requiring a subscription to MailChimp, I am attempting to modify our forms so that they do not use Mandrill for emails.  The issue that I am having is that when I use an SMTP server (I have tried two) it will only show the email as coming from the individual email address setup in the SMTP configuration.  

We rely on the "from" email address being one that is provided on the form (in an "email" field) in order to properly assign tickets properly using our Help Desk software.  If all emails come from an individual address, this is going to put a large burden on our employees to sort each and every submission that comes in.

Is there a way to use an external SMTP server (we have one on-site at our organization), but have the "From" email address on the notification email display the email address that the user submits on the form itself?

Thank you.

If I understand your issue correctly you mean that you want the user's email address to remain as unique from addresses so that your staff can assign them accordingly instead of just being under one email address.

To my current knowledge what you've seen for our smtp setups is only what we have right now and as far as I know we don't have any way to support any external setup other than similar to mandrill and the smtp settings that you would enter into it.

What you could do to prevent them from stacking is use the email tag for your email field within the subject line as that would change it to being unique.

Thanks for the response Kade, however, that solution will not work for us as our ticket system bases ticket assignment on the email address only, not on a specific subject line.

We will look for alternative solutions.  Thank you again for your time.

I've been playing with this for a bit now to try to help assist you with it better.

And I'm unsure if it'd be of any interest to you or not but one thing you could try doing is use a Textbox Field as your Email Field alternatively. Then you can set it's validation to Email Address and this way you could then use it and force it to appear as your From Address of your users.

Example: 

Result:

Backend:

This is the only other option I can think of that might make it work better to your advantage.