How can I make at registration 2 fields for e-mail? Like password...

To put members to type 2 time theyr e-mail address and if is not the same they can't continue.

I ask this because soetimes user write wrong e-mail and is clear that they wan to join the site but with wrong email is not ok. They wait for confirmation e-mail and I wait for they to confirm ... :) (ok I receive the mail delivery fail)

If is not a valid e-mail I can't anounce them to write the correct addres.. :))

Any ideea?

Thank you