C# 使用Amazon AWS SMTP发送带有附件的电子邮件

我正在尝试使用amazon WS-SMTP发送电子邮件，发送成功，但我从未收到电子邮件。当我在没有附件的情况下发送它时，我成功地收到了它

这是我的密码

// Create an SMTP client with the specified host name and port.
        using (SmtpClient client = new SmtpClient(ssHost, ssPort))
        {
            // Create a network credential with your SMTP user name and password.
            client.Credentials = new System.Net.NetworkCredential(ssSMTP_Username, ssSMTP_Password);

            // Use SSL when accessing Amazon SES. The SMTP session will begin on an unencrypted connection, and then 
            // the client will issue a STARTTLS command to upgrade to an encrypted connection using SSL.
            client.EnableSsl = true;
            // Send the email. 

            MailMessage message = new MailMessage();
            try
            {
                //creates a messages with the all data
                message.From = new MailAddress(ssFrom, ssFromName);
                //message.To.Add(ssTo);
                //To
                List<String> toAddresses = ssTo.Split(',').ToList();
                foreach (String toAddress in toAddresses)
                {
                    message.To.Add(new MailAddress(toAddress));
                }
                //cc
                List<String> ccAddresses = ssCC.Split(',').Where(y => y != "").ToList();
                foreach (String ccAddress in ccAddresses)
                {
                    message.CC.Add(new MailAddress(ccAddress));
                }
                //bcc
                List<String> BccAddresses = ssBcc.Split(',').Where(y => y != "").ToList();
                foreach (String ccAddress in ccAddresses)
                {
                    message.Bcc.Add(new MailAddress(ccAddress));
                }

                //replyTo
                if (ssReplyTo != null)
                {
                    message.ReplyToList.Add(new MailAddress(ssReplyTo));
                }

                //email
                message.Subject = ssSubject;
                message.Body = ssBody;
                message.IsBodyHtml = true;


                //Attachment
                foreach (RCAttachmentRecord attchmentRec in ssAttachmenstList){
                    System.IO.MemoryStream ms = new System.IO.MemoryStream(attchmentRec.ssSTAttachment.ssBinary);
                    Attachment attach = new Attachment(ms, attchmentRec.ssSTAttachment.ssFilename);
                    message.Attachments.Add(attach);

                    ssErrorMessage = ssErrorMessage + "||" + attchmentRec.ssSTAttachment.ssFilename+"lenght:"+attchmentRec.ssSTAttachment.ssBinary.Length;
                }
                client.Send(message);

            }

//使用指定的主机名和端口创建SMTP客户端。
使用（SmtpClient客户端=新SmtpClient（ssHost、ssPort））
{
//使用SMTP用户名和密码创建网络凭据。
client.Credentials=new System.Net.NetworkCredential（ssSMTP\u用户名、ssSMTP\u密码）；
//访问Amazon SES时使用SSL。SMTP会话将在未加密的连接上开始，然后
//客户端将发出STARTTLS命令以升级到使用SSL的加密连接。
client.enablesl=true；
//发送电子邮件。
MailMessage=新的MailMessage（）；
尝试
{
//创建包含所有数据的消息
message.From=新邮件地址（ssFrom，ssFromName）；
//message.To.Add（ssTo）；
//到
List toaddress=ssTo.Split（'，'）.ToList（）；
foreach（toAddress中的字符串toAddress）
{
message.To.Add（新邮件地址（toAddress））；
}
//抄送
列出ccaddress=ssCC.Split（'，'）。其中（y=>y！=“”）。ToList（）；
foreach（ccAddress中的字符串ccAddress）
{
message.CC.Add（新邮件地址（ccAddress））；
}
//密件抄送
列出bccadirements=ssBcc.Split（'，'）。其中（y=>y！=“”）。ToList（）；
foreach（ccAddress中的字符串ccAddress）
{
message.Bcc.Add（新邮件地址（ccAddress））；
}
//答复
if（ssReplyTo！=null）
{
message.ReplyToList.Add（新邮件地址（ssReplyTo））；
}
//电子邮件
message.Subject=ssSubject；
message.Body=ssBody；
message.IsBodyHtml=true；
//附件:
foreach（SSAttachmentList中的RCAttachmentRecord附件中心）{
System.IO.MemoryStream ms=新的System.IO.MemoryStream（attchCenter.ssStatAttachment.ssBinary）；
Attachment attach=新附件（ms，attchcentre.ssSTAttachment.ssFilename）；
message.Attachments.Add（附加）；
ssErrorMessage=ssErrorMessage+“| |”+attchcentre.ssSTAttachment.ssFilename+“Length:”+attchcentre.ssSTAttachment.ssBinary.Length；
}
客户端。发送（消息）；
}

---

来源：

我认为你的问题可能是没有正确地将附件添加到邮件中

我成功地发送了一封带有附件的邮件。我从直接从中获取的代码开始。然后从中添加了代码

附件是“我的文档”文件夹中的Word文档

Lebowski.docx

。我建议您创建一个类似的简单Word文档，并运行以下代码以验证您可以在一封电子邮件中发送简单附件

以下代码成功地为我工作：

namespace SESTest
{
using System;
using System.Net.Mail;

namespace AmazonSESSample
{
    class Program
    {
        static void Main(string[] args)
        {
            const String FROM = "from-email";   // Replace with your "From" address. This address must be verified.
            const String TO = "to-email";  // Replace with a "To" address. If your account is still in the
                                                        // sandbox, this address must be verified.

            const String SUBJECT = "Amazon SES test (SMTP interface accessed using C#)";
            const String BODY = "This email and attachment was sent through the Amazon SES SMTP interface by using C#.";

            // Supply your SMTP credentials below. Note that your SMTP credentials are different from your AWS credentials.
            const String SMTP_USERNAME = "user-creds";  // Replace with your SMTP username. 
            const String SMTP_PASSWORD = "password";  // Replace with your SMTP password.

            // Amazon SES SMTP host name. 
            const String HOST = "your-region.amazonaws.com";

            // The port you will connect to on the Amazon SES SMTP endpoint. We are choosing port 587 because we will use
            // STARTTLS to encrypt the connection.
            const int PORT = 2587;

            // Create an SMTP client with the specified host name and port.
            using (System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient(HOST, PORT))
            {
                // Create a network credential with your SMTP user name and password.
                client.Credentials = new System.Net.NetworkCredential(SMTP_USERNAME, SMTP_PASSWORD);

                // Use SSL when accessing Amazon SES. The SMTP session will begin on an unencrypted connection, and then 
                // the client will issue a STARTTLS command to upgrade to an encrypted connection using SSL.
                client.EnableSsl = true;

                // Send the email. 
                try
                {
                    Console.WriteLine("Attempting to send an email through the Amazon SES SMTP interface...");

                    var mailMessage = new MailMessage()
                    {
                        Body = BODY,
                        Subject = SUBJECT,
                        From = new MailAddress(FROM)
                    };
                    mailMessage.To.Add(new MailAddress(TO));

                    //REMOVE THIS CODE
                    //System.IO.MemoryStream ms = new System.IO.MemoryStream(attchmentRec.ssSTAttachment.ssBinary);
                    //Attachment attach = new Attachment(ms, attchmentRec.ssSTAttachment.ssFilename);
                    //mailMessage.Attachments.Add(attach);

                    System.Net.Mime.ContentType contentType = new System.Net.Mime.ContentType();
                    contentType.MediaType = System.Net.Mime.MediaTypeNames.Application.Octet;
                    contentType.Name = "Lebowski.docx";
                    mailMessage.Attachments.Add(new Attachment("C:\\users\\luis\\Documents\\Lebowski.docx", contentType));

                    client.Send(mailMessage);

                    Console.WriteLine("Email sent!");
                }
                catch (Exception ex)
                {
                    Console.WriteLine("The email was not sent.");
                    Console.WriteLine("Error message: " + ex.Message);
                }
            }

            Console.Write("Press any key to continue...");
            Console.ReadKey();
        }
    }
}
}

---

一旦你证明你可以从你的帐户发送一封带有一个附件的电子邮件，那么你就可以开始研究如何将

ssAttachmentsList

中的二进制文件放入你的电子邮件中，并将正确的内容类型分配给每封邮件。但是你没有提供足够的代码或上下文，我现在无法确定。我希望这段代码我会帮你解决附件问题。

你能发布更多代码吗？为了帮助你，我们需要知道你如何定义和填充

SSAttachmentList

-谢谢。检查这个问题，也许能帮你解决吗？@Taterhead将该变量作为ArrayList@KaranShah谢谢，但没用。我想我找到问题了。我正在附加ZIP文件，但不知怎的，当我附加ZIP时，邮件被丢弃，如果我将文件重命名为ZI或发送图像，我总是会收到电子邮件。确定-ZIP附件-这很好。请记住，许多邮件安全筛选器会剥离并替换.ZIP附件。如果发送存储在值得信任的云位置（可能是s3 bucket）供他们下载。祝你好运。