Hello,
I have read your requirement and I understand that you need to a validation to be implemented in the Email Field so that gmail, yahoo, hotmail, outlook, are not accepted as input.
Let me assure you I have tons of experience in website designing and development.
I am an IT professional with 3+ years of experience in Shopify, wordpress, website designing, ERP, C and C++ Programming, MS Office Products.
Kindly message me so that we can discuss the requirements in detail and also the pricing.
Hope we can have a great collaboration.