SI: Email Validation Could be Improved

[mtrutledge]

Describe the bug

We had a user attempting to place an order on our site with a email address similar to the following:
mXX09871223_@example.com

Once she clicked to checkout she was told the email was invalid. She had already created a user in our system with that email address and was logged in. This is a weird email address, but it is still valid.

Software Versions

• DNN: 09.10.06
• Hotcakes: 03.06.00

To Reproduce

Steps to reproduce the behavior:

1. Add items to the cart
2. Go to checkout
3. Try checking out as guest and enter email address mXX09871223_@example.com
4. Hotcakes will stop the order and let the user know they need to enter a valid email address

Expected behavior

This email address should be considered valid and the order should be placed.

Actual behavior

The user was shown an error saying the email address was invalid.