I was checking this post: How do I set up email confirmation with Devise?
In hope to test email confirmation using mailcatcher. Unfortunately, I got this error, and I searched for several hours without being able to fix it.
SSL_connect returned=1 errno=0 state=unknown state: unknown protocol
Apparently, it is a Ubuntu bug: https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/965371
Also, I tried this approach, creating mail_patch.rb: http://www.tagwith.com/question_1864741_opensslsslsslerror-in-devise/
My fear is that, if I disable mail sending errors (ignore them for now, as I'm on development mode), once I change to production (of course I wouldn't use mailcatcher), I would still not be able to send e-mails.