vs2003发送邮件异常

[loveflydhl]

The transport failed to connect to the server.
说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.Runtime.InteropServices.COMException: The transport failed to connect to the server.

[TargetInvocationException: 调用的目标发生了异常。]
[HttpException (0x80004005): 未能访问“CDO.Message”对象。]


代码：

private void Btn1_Click(object sender, System.EventArgs e)
{
sendEamil(txt_add.Text,"[e-mail]",txt_title.Text,txt_content.Text,"[e-mail]","***","123.125,50.22","");
}
public void sendEamil(string toAddress,string formAddress,string maintile,string body,string EmailUserName,string EmailPWD,string EmailServerIP,string MailAttachmentUrl)//发送邮件
{
MailMessage mail = new MailMessage();
mail.To =toAddress;
mail.From =formAddress;
mail.Subject =maintile;
mail.Body = body;
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername",EmailUserName); //用户名全名
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", EmailPWD); //密码全名




if(MailAttachmentUrl!="")
{
MailAttachment mailAttach= new MailAttachment(MailAttachmentUrl); //附件
mail.Attachments.Add(mailAttach);
}
SmtpMail.SmtpServer =EmailServerIP; //smtp邮件服务器


SmtpMail.Send(mail);


}

[蓝海D鱼]

.net，利用STMP服务器发送邮件时报错。

造成这种原因可能有很多种，网上也有很多相关的文章。如果你确定你之前发送邮件成功，或者在本机成功，而发布到服务器上时出问题。可以考虑看看以下原因：

1. 是否因为防火墙和杀毒软件导致的，他们均带有邮件拦截的功能。
2. 是否因为没有注册相关动态链接库文件，使用命令：regsvr32 cdonts.dll试试(使用该命令，需要先进入system32目录下，有可能会没有cdonts.dll文件，没有就去网上下一个)。
3. STMP服务是否安装，控制面板->添加删除程序->添加windows组件->IIS
4. 邮件服务器是否正确（有时候是权限问题，换个邮件服务器试试）

资料
资料

[llsen]

using System.Net.Mail; 
using System.Net.Mime; 
using System.Net; 

public static void CreateMessageWithAttachment(string server) 
    { 
        // Specify the file to be attached and sent. 
        // This example assumes that a file named Data.xls exists in the 
        // current working directory. 
        string file = @"D:\asdf.txt"; 
        // Create a message and set up the recipients. 
        MailMessage message = new MailMessage( 
          "[e-mail]", 
          "[e-mail]", 
          "test", 
          "no du"); 

        // Create  the file attachment for this e-mail message. 
        Attachment data = new Attachment(file, MediaTypeNames.Application.Octet); 
        // Add time stamp information for the file. 
        ContentDisposition disposition = data.ContentDisposition; 
        disposition.CreationDate = System.IO.File.GetCreationTime(file); 
        disposition.ModificationDate = System.IO.File.GetLastWriteTime(file); 
        disposition.ReadDate = System.IO.File.GetLastAccessTime(file); 
        // Add the file attachment to this e-mail message. 
        message.Attachments.Add(data); 
        //Send the message. 
        SmtpClient client = new SmtpClient(server); 
        // Add credentials if the SMTP server requires them. 
        //client.Credentials = CredentialCache.DefaultNetworkCredentials; 
        client.UseDefaultCredentials = true; 
        client.Credentials = new System.Net.NetworkCredential("username", "password"); 
        client.Send(message); 
        // Display the values in the ContentDisposition for the attachment. 
        ContentDisposition cd = data.ContentDisposition; 
        Console.WriteLine("Content disposition"); 
        Console.WriteLine(cd.ToString()); 
        Console.WriteLine("File {0}", cd.FileName); 
        Console.WriteLine("Size {0}", cd.Size); 
        Console.WriteLine("Creation {0}", cd.CreationDate); 
        Console.WriteLine("Modification {0}", cd.ModificationDate); 
        Console.WriteLine("Read {0}", cd.ReadDate); 
        Console.WriteLine("Inline {0}", cd.Inline); 
        Console.WriteLine("Parameters: {0}", cd.Parameters.Count); 
        foreach (DictionaryEntry d in cd.Parameters) 
        { 
            Console.WriteLine("{0} = {1}", d.Key, d.Value); 
        } 
        data.Dispose(); 
    } 

    protected void Timer1_Tick(object sender, EventArgs e) 
    { 
        if (DateTime.Now.Second % 20 == 0) 
        { 
            CreateMessageWithAttachment("smtp.163.com"); 
        } 
    }

看这个

[qiqundelang]

没遇到过

[loveflydhl]

回复楼上 Vs2003 都没得System.net.maile类 发帖子就说了是VS2003

[loveflydhl]

看样没人知道了