Action Mailer email verification

Hi guys,

I'm starting a new app from scratch, and I'd need to make an email
verification. What do you suggest to use? ActionMailer? Some other gem?
I took a look around and I found Authlogic and Devise that do this kind
of thing, but I messed a little bit with and they don't convince me a
lot, especially about Devise's irreversible migrations.

Which method would you use?