我采用了.net 的自带组件System.Net.Mail发送邮件，主要是在客户注册网站成功的时候发条欢迎邮件，最近邮件无法发送了，看了下腾讯smtp邮件配置，所有的邮件发送都换成ssl了，之前用的是25端口，现在换成了465或587，于是修改代码如下：
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MailMessage msgMail =
new
MailMessage(
"发件箱"
,
"收件箱"
,
"邮件标题"
,
"邮件内容"
);
SmtpClient smtp =
new
SmtpClient(
"smtp.qq.com"
, 465);
smtp.EnableSsl =
true
;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.Credentials =
new
System.Net.NetworkCredential(
"发件箱"
,
"发件箱登录密码"
);
try
{
smtp.Send(msgMail);
}
catch
(Exception ex)
{
Console.WriteLine(
"发送完毕......"
);
}
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这样还是不行，报操作已超时错误 在国外的技术网站上看到一句话System.Net.Mail支持Explicit SSL但是不支持Implicit SSL，然后查了下关于这两个模式的资料，我按照我理解的说一下：
Explicit SSL 发起于未加密的25，然后进行一个starttl握手，最终切换到加密的连接。
Implicit SSL 直接从指定的端口发起starttl握手。
既然指定了端口，那么应该就是使用了Implicit SSL，不知道微软什么时候能更新下System.net.mail，System.net.mail能在邮件中嵌入图片的。问题到了这里，那是不是就没有办法利用腾讯邮箱发邮件了呢？答案肯定是否定的，foxmail不就可以配置发送邮件吗？我们可以利用CDO.Message和System.web.mail发送邮件。
C#利用CDO.Message发送邮件
如何引用CDO.Message？ cod.message的引用位置： C:\Windows\System32\cdosys.dll
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CDO.Message objMail =
new
CDO.Message();
try
{
objMail.To =
"接收邮件账号"
;
objMail.From =
"发送邮件账号"
;
objMail.Subject =
"subject"
;
//邮件主题string strHTML = @"";
strHTML = strHTML +
"这里可以填写html内容"
;
objMail.HTMLBody = strHTML;
//邮件内容
objMail.Configuration.Fields[
"http://schemas.microsoft.com/cdo/configuration/smtpserverport"
].Value = 465;//设置端口
objMail.Configuration.Fields[
"http://schemas.microsoft.com/cdo/configuration/smtpserver"
].Value =
"smtp.qq.com"
;
objMail.Configuration.Fields[
"http://schemas.microsoft.com/cdo/configuration/sendemailaddress"
].Value =
"发送邮件账号"
;
objMail.Configuration.Fields[
"http://schemas.microsoft.com/cdo/configuration/smtpuserreplyemailaddress"
].Value =
"发送邮件账号"
;
objMail.Configuration.Fields[
"http://schemas.microsoft.com/cdo/configuration/smtpaccountname"
].Value =
"发送邮件账号"
;
objMail.Configuration.Fields[
"http://schemas.microsoft.com/cdo/configuration/sendusername"
].Value =
"发送邮件账号"
;
objMail.Configuration.Fields[
"http://schemas.microsoft.com/cdo/configuration/sendpassword"
].Value =
"发送邮件账号登录密码"
;
objMail.Configuration.Fields[
"http://schemas.microsoft.com/cdo/configuration/sendusing"
].Value = 2;
objMail.Configuration.Fields[
"http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"
].Value = 1;
objMail.Configuration.Fields[
"http://schemas.microsoft.com/cdo/configuration/smtpusessl"
].Value =
"true"
;//这一句指示是否使用ssl
objMail.Configuration.Fields.Update();
objMail.Send();
}
catch
(Exception ex) {
throw
ex; }
finally
{ }
System.Runtime.InteropServices.Marshal.ReleaseComObject(objMail);
objMail =
null
;
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C#利用System.web.mail发送邮件
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System.Web.Mail.MailMessage mail =
new
System.Web.Mail.MailMessage();
try
{
mail.To =
"收件人邮箱"
;
mail.From =
"发件人邮箱"
;
mail.Subject =
"subject"
;
mail.BodyFormat = System.Web.Mail.MailFormat.Html;
mail.Body =
"body"
;
mail.Fields.Add(
"http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"
,
"1"
); //basic authentication
mail.Fields.Add(
"http://schemas.microsoft.com/cdo/configuration/sendusername"
,
"发件人邮箱"
); //
set
your username here
mail.Fields.Add(
"http://schemas.microsoft.com/cdo/configuration/sendpassword"
,
"发件人邮箱密码"
); //
set
your password here
mail.Fields.Add(
"http://schemas.microsoft.com/cdo/configuration/smtpusessl"
,
"true"
);//
set
is
ssl
System.Web.Mail.SmtpMail.SmtpServer =
"smtp.qq.com"
;
System.Web.Mail.SmtpMail.Send(mail);
//return true;
}
catch
(Exception ex)
{
ex.ToString();
}
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