I want to use a Google Form to populate a Google Spreadsheet. One of the fields is email address, and I need to validate this against the list of emails for our organisation - in other words forcing people to use valid and existing email addresses.
Our organisation uses Google Apps. The form will be created by a user who is in our organisation and only email addresses from our organisation/domain will be considered valid.
Now you can put a Regular Expresion in the field:
For EMAIL:
[a-zA-Z0-9_\.\+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-\.]+