环境：Windows 2016 - IIS - asp, 阿里云免费邮箱账户 anqunhe@aliyun.com

过程：

1.创建 asp-sent-mail.asp 文件，内容如下，关键信息 “smtpserver”填写“smtp.aliyun.com”，“smtpserverport”填写“465”，“sendusername”填写“anqunhe@aliyun.com”，“sendpassword”填写“您的密码”，“Mail.From”填写“anqunhe@aliyun.com”

<%
Set Mail = CreateObject("CDO.Message")

Mail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
Mail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpserver") ="smtp.aliyun.com"
Mail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 465

Mail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpusessl") = 1

Mail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpconnectiontimeout") = 60

Mail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate") = 1
Mail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/sendusername") ="anqunhe@aliyun.com"
Mail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/sendpassword") ="password"

Mail.Configuration.Fields.Update

Mail.Subject="Email subject"
Mail.From="anqunhe@aliyun.com"
Mail.To="liu@anqun.net"
Mail.TextBody="This is an email message."

Mail.Send
Set Mail = Nothing
%>

2.在浏览器里访问这个asp-sent-mail.asp文件，发出邮件，测试成功

参考：

• http://webcheatsheet.com/asp/sending_email_asp.php
• http://www.cnblogs.com/qiangshu/archive/2009/12/22/1629829.html