MailSender没有回执功能
试试使用。net的用法:http://www.foxtable.com/bbs/dispbbs.asp?BoardID=2&ID=75210&replyID=518867&skin=1
添加几句
message.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess
message.Headers.Add("Disposition-Notification-To", "接收回执的地址如455189993@qq.com")
message.Headers.Add("Return-Receipt-To", "接收回执的地址如455189993@qq.com")