One solution is to sign up for a MedsGold listing
With a Medsgold Listing you have the option to add a text (SMS) notification and receive replies instantly!
You will still receive an email notification and can login to check your dashboard for any replies as always.
Here are some tips to help whitelist and prevent emails from going into the junk or spam folder:
For Gmail:

For Safari:
Open the email from the sender that you want to whitelist.Click on the "Not Junk" button.