signing request$csr = openssl_csr_new($dn, $privkey, array('digest_alg' => 'sha256'));// Generate a self-signed
localhost:993/imap/ssl}INBOX", "user_id", "password");// To connect to an SSL IMAP or POP3 server with a self-signed
OpenSSL::X509::Name.parse"/DC=org/DC=ruby-lang/CN=RubyCA"root_ca.issuer=root_ca.subject#rootCA'sare"self-signed"root_ca.public_key