如何发送电子邮件

本文关键字：电子邮件 何发送 | 更新日期: 2023-09-27 18:15:59

我是Asp.net的新手，我需要使用我的Outlook从Asp.net发送电子邮件。我有一个按钮在asp，当我点击按钮(发送)我想发送电子邮件。我尝试使用Hotmail和Gmail，但远程服务器被阻止。如果你不明白我的问题，请告诉我。我试过了:

         var smtpClient = new SmtpClient
        {
            Host = "outlook.mycompany.local",
            UseDefaultCredentials = false,
            Credentials = new NetworkCredential("myEmail@mycommpany.com", "myPassword")
        };
        var message = new System.Net.Mail.MailMessage
        {
            Subject = "Test Subject",
            Body = "FOLLOW THE WHITE RABBIT",
            IsBodyHtml = true,
            From = new MailAddress("myemail@mycommapny.com")
        };
        // you can add multiple email addresses here
        message.To.Add(new MailAddress("friendEmail@Company.com"));
        // and here you're actually sending the message
        smtpClient.Send(message);
}

exception Show: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.1 Client was not authenticated

如何发送电子邮件

从ASP.net网站发送出站电子邮件可能会有问题。即使您获得了正确的SMTP信息，您仍然需要处理:

  • 发件人策略框架(SPF)
  • 白名单和黑名单
    • <
  • 验证/gh>
  • 反弹

你自己很难做到这一点，这就是为什么你可能想要考虑使用服务提供者。您只需使用他们的API(通常是一个REST调用)，其余的由他们来完成。以下是三个这样的提供者:

  • SendGrid
  • 山魈
  • Mailgun

Mandrill有一个低端的免费计划，如果你在Windows Azure上使用它，SendGrid也是如此。而且它们都是相当实惠的，即使是更大的计划。

我强烈建议使用其中一个带有自己的API，而不是自己使用System.Net.Mail。但是如果你愿意，他们也可以为你充当SMTP中继，这样你就可以使用他们的SMTP服务器并保持你的System.Net.Mail代码完整。

首先获取公司SMTP服务器设置(我猜是从你的系统管理员)，然后你可以做这样的事情:

// setting up the server
var smtpClient = new SmtpClient
{
    Host = "your.company.smtp.server",
    UseDefaultCredentials = false,
    EnableSsl = true, // <-- see if you need this
    Credentials = new NetworkCredential("account_to_use", "password")
};
var message = new MailMessage
{
    Subject = "Test Subject",
    Body = "FOLLOW THE WHITE RABBIT",
    IsBodyHtml = true,
    From = new MailAddress("from@company.com")
};
// you can add multiple email addresses here
message.To.Add(new MailAddress("neo@matrix.com"));
// and here you're actually sending the message
smtpClient.Send(message);

可以使用这个函数。还有一件事你必须将你的电子邮件SMTP登录名和密码存储在web配置文件

中
/// <summary>
/// Send Email 
/// </summary>
/// <param name="strFrom"></param>
/// <param name="strTo"></param>
/// <param name="strSubject"></param>
/// <param name="strBody"></param>
/// <param name="strAttachmentPath"></param>
/// <param name="IsBodyHTML"></param>
/// <returns></returns>
public Boolean sendemail(String strFrom, string strTo, string strSubject, string strBody, string strAttachmentPath, bool IsBodyHTML)
{
    Array arrToArray;
    char[] splitter = { ';' };
    arrToArray = strTo.Split(splitter);
    MailMessage mm = new MailMessage();
    mm.From = new MailAddress(strFrom);
    mm.Subject = strSubject;
    mm.Body = strBody;
    mm.IsBodyHtml = IsBodyHTML;
    //mm.ReplyTo = new MailAddress("replyto@xyz.com");
    foreach (string s in arrToArray)
    {
        mm.To.Add(new MailAddress(s));
    }
    if (strAttachmentPath != "")
    {
        try
        {
            //Add Attachment
            Attachment attachFile = new Attachment(strAttachmentPath);
            mm.Attachments.Add(attachFile);
        }
        catch { }
    }
    SmtpClient smtp = new SmtpClient();
    try
    {
        smtp.Host = ConfigurationManager.AppSettings["MailServer"].ToString();
        smtp.EnableSsl = true; //Depending on server SSL Settings true/false
        System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();
        NetworkCred.UserName = ConfigurationManager.AppSettings["MailUserName"].ToString();
        NetworkCred.Password = ConfigurationManager.AppSettings["MailPassword"].ToString();
        smtp.UseDefaultCredentials = true;
        smtp.Credentials = NetworkCred;
        smtp.Port = 587;//Specify your port No;
        smtp.Send(mm);
        return true;
    }
    catch
    {
        mm.Dispose();
        smtp = null;
        return false;
    }
}

试试Amazon Simple Email Service (http://aws.amazon.com/ses/)。如果您是亚马逊网络服务(AWS)的新手，可能会有一个学习曲线。然而，一旦你熟悉了他们的SDK(可以在Nuget上找到)，这个过程就非常简单了(Amazon确实有很多奇怪的小包装类)。

那么，要回答"如何发送电子邮件?"这个问题，它看起来像这样:

        var fromAddress = "from@youraddress.com";
        var toAddresses = new Amazon.SimpleEmail.Model.Destination("someone@somedestination.com");
        var subject = new Amazon.SimpleEmail.Model.Content("Message");
        var body= new Body(new Amazon.SimpleEmail.Model.Content("Body"));
        var message = new Message(subject , body);
        var client = ConfigUtility.AmazonSimpleEmailServiceClient;
        var request= new Amazon.SimpleEmail.Model.SendEmailRequest();
        request.WithSource(fromAddress)
                            .WithDestination(toAddresses)
                            .WithMessage(message );
        try
        {
            client.SendEmail(request);
        }
        catch (Amazon.SimpleEmail.AmazonSimpleEmailServiceException sesError)
        {
            throw new SupplyitException("There was a problem sending your email", sesError);
        }

您可以参考以下链接:

http://www.codeproject.com/Tips/371417/Send-Mail-Contact-Form-using-ASP-NET-and-Csharp

发送邮件asp.net c#

我希望它能帮助你。:)

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