asp发邮件功能怎么实现

ASP发邮件功能可以通过引用CDOSYS组件来实现。具体步骤如下：
1. 在ASP页面中引用CDOSYS组件。
```
<%@ Language=VBScript %>
<%
Set objEmail = CreateObject("CDO.Message")
%>
```
2. 设置邮件的相关属性，包括发件人、收件人、主题、内容等。
```
<%
objEmail.From = "发件人邮箱"
objEmail.To = "收件人邮箱"
objEmail.Subject = "邮件主题"
objEmail.TextBody = "邮件内容"
%>
```
3. 设置SMTP服务器的信息。
```
<%
objEmail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
objEmail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpserver") = "SMTP服务器地址"
objEmail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 25
objEmail.Configuration.Fields.Update
%>
```
4. 发送邮件。
```
<%
objEmail.Send
%>
```
完整代码示例：
```
<%@ Language=VBScript %>
<%
Set objEmail = CreateObject("CDO.Message")
objEmail.From = "发件人邮箱"
objEmail.To = "收件人邮箱"
objEmail.Subject = "邮件主题"
objEmail.TextBody = "邮件内容"
objEmail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
objEmail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpserver") = "SMTP服务器地址"
objEmail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 25
objEmail.Configuration.Fields.Update
objEmail.Send
%>
```