主题：向QQ邮箱发送邮失败

Dim m As New MailSender
Dim ln As String = vbcrlf & vbcrlf '定义两个换行

m.EnableSsl = True                          ‘也试过False
m.Host = "smtp.163.com"
m.Account = "XXXXX"
m.Password = "YYYYY"            '163帐号的授权码
     m.From = "xiaoliu@Sina.com.cn"
For Each dr As DataRow In DataTables("借款").Select("到期日期<= #" & Date.Today.AddDays(10) & "#")
m.To = dr("邮件地址")
m.Title = "催款通知"
m.Content = dr("姓名") & dr("尊称") & ":" & ln & "您的贷款将于" & dr("到期日期") & "到期, "
m.Content = m.Content & "金额为" & dr("金额") & "元, 请准时还款!" & ln & "某某公司" & vbcrlf & Date.today
m.SendAsync()
Next