[dovecot] Something wrong in SSL ?

Operating system: FreeBSD 4.7-RELEASE-p10 Dovecot: 0.99.8.1

I've used openssl to generate personal CA and I've used that one to generate certificate for my web server. When I tried to go through same pattern for generating certificate for IMAP server from CA, I ended up in situation, where both mutt and evolution keep on rejecting my certificates.