class Net::POP3

+params+ (except :port) is passed to OpenSSL::SSLContext#set_params.
+params[:port]+ is port to establish the SSL connection on; Defaults to 995.
established to have any effect.
Enables SSL for this instance. Must be called before the connection is

Net::POP#enable_ssl(params = {})
:call-seq:

def enable_ssl(verify_or_params = {}, certs = nil, port = nil)
  begin
    @ssl_params = verify_or_params.to_hash.dup
    @port = @ssl_params.delete(:port) || @port
  rescue NoMethodError
    @ssl_params = POP3.create_ssl_params(verify_or_params, certs)
    @port = port || @port
  end
end