. POP3
Mail.defaults do
  retriever_method :pop3, :address    => "pop.gmail.com",
                          :port       => 995,
                          :user_name  => '<username>',
                          :password   => '<password>',
                          :enable_ssl => true
end

# IMAP
Mail.defaults do
  retriever_method :imap, :address    => "imap.mailbox.org",
                          :port       => 993,
                          :user_name  => '<username>',
                          :password   => '<password>',
                          :enable_ssl => true
end