itemid,ID,
title,标题,
style,颜色,
typeid,类型,
content,内容,
fromuser,发件人,
touser,收件人,
addtime,发件时间,
ip,IP,
isread,是否已读,
issend,是否已转发至邮箱,
feedback,已读回执,
status,状态,
groupids,群发会员组,
mid,模块ID,
tid,信息ID,