In an attempt to reduce to the very minimal the number of fields for a user to register to our services I am wondering whether to replace the fields company and email with only one "company's email". The assumption is that I could then work out the company from the email. so
company: [....] email: [....]
company's email: [....]
This of course means that a user can not register with his/her gmail or hotmail and so on. But I am okay with that.
Can somebody see any flaw in this approach ?