@cameronlesko 

Sadly that happening is a direct result of intuits method of sending emails, everything comes from intuit rather than from your email address.  Since every other site ion the net can use your email instead of intuits, it has to be deliberate.

But because of the return address, a lot of email software mark it as spam.

All you can do is ask your customers to  set a rule to allow that email address to go to the inbox and not the spam folder