c#实现的基于winform邮件群发程序，采用的access数据库，可发多个附件，多个收件人邮箱和发件人邮箱可存入数据库，使用时可以自动提出-achieve c# winform mass mailing program, using the access database can send multiple attachments, multiple recipients mailbox and the sender mailbox can be stored in the database