1	english	x-vnd.Be-MAIL	939699066
out	B_USER_DIRECTORY/mail/out		发件箱
in	B_USER_DIRECTORY/mail/in		收件箱
queries	B_USER_DIRECTORY/mail/queries		查询
sent	B_USER_DIRECTORY/mail/sent		已发送
mail	B_USER_DIRECTORY/mail		邮件
draft	B_USER_DIRECTORY/mail/draft		草稿箱
spam	B_USER_DIRECTORY/mail/spam		垃圾邮件