代码之家 › 专栏 › 技术社区 › Vishal Parmar

部署到主机后,使用gmail通过C#发送邮件不起作用

smtpclient gmail email c#

Vishal Parmar · 技术社区 · 6 年前

我想通过Gmail发邮件。当我在localhost上测试时,我成功地发送了邮件,但是当我将邮件上载到web主机时,这不起作用。我看到这种类型的错误:

请求System.Net.Mail.SmtpPermission,System,Version=4.0.0.0,Culture=neutral,PublicKeyToken=b77a5c561934e089类型的权限失败。

无论何时使用端口25,都会出现以下类型的错误:

SMTP服务器需要安全连接,或者客户端未通过身份验证。服务器响应为:需要5.5.1身份验证

下面是我发送电子邮件的代码。

MailMessage mail = new MailMessage("host@gmail.com","User@gamil.com");

SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");              
mail.Subject = "Any String" 
mail.Body = mailbody;
mail.IsBodyHtml = true;
SmtpServer.Port = 587;
SmtpServer.DeliveryMethod = SmtpDeliveryMethod.Network;
SmtpServer.UseDefaultCredentials = false;
SmtpServer.Credentials = new System.Net.NetworkCredential("xyz@gmail.com","123");               
SmtpServer.EnableSsl = true;

SmtpServer.Send(mail);

有什么解决办法吗?请给我建议!

3 回复 | 直到 5 年前

MindSwipe 6 年前

编辑: OP补充了对回答这个问题至关重要的额外信息,但我保留了旧的答案,因为它可能仍然对某人有帮助

新答案: This StackOverflow问题已回答此问题

旧答案: 作为 this 587 而不是它的默认值( 25 )这需要提升权限,导致此错误,请更改以下内容:

SmtpServer.Port = 587;

对此:

SmtpServer.Port = 25;

注: 443

Ahmet Uyar 6 年前

您的代码添加 SmtpDeliveryFormat.SevenBit

例子:

using (SmtpClient smtp = new SmtpClient())
                {
                    NetworkCredential credential = new NetworkCredential
                    {
                        UserName = WebConfigurationManager.AppSettings["UserName"],
                        Password = WebConfigurationManager.AppSettings["Password"],
                    };
                    smtp.Credentials = credential;
                    smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                    smtp.DeliveryFormat = SmtpDeliveryFormat.SevenBit;
                    smtp.Host = WebConfigurationManager.AppSettings["Host"];
                    smtp.Port = WebConfigurationManager.AppSettings["Port"].ToNcInt();
                    smtp.EnableSsl = Convert.ToBoolean(WebConfigurationManager.AppSettings["EnableSsl"]);
                    smtp.Send(mail);
                }

-1

sanvssan 6 年前

试试这个

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

namespace AmazonSESSample
{
    class Program
{
    static void Main(string[] args)
    {
        // Replace sender@example.com with your "From" address. 
        // This address must be verified with Amazon SES.
        String FROM = "a@a.com";
        String FROMNAME = "ABC";

        // Replace recipient@example.com with a "To" address. If your account 
        // is still in the sandbox, this address must be verified.
        String TO = "a@a.com";

        // Replace smtp_username with your Amazon SES SMTP user name.
        String SMTP_USERNAME = "a@a.com";

        // Replace smtp_password with your Amazon SES SMTP user name.
        String SMTP_PASSWORD = "ASJKAJSN";

        // (Optional) the name of a configuration set to use for this message.
        // If you comment out this line, you also need to remove or comment out
        // the "X-SES-CONFIGURATION-SET" header below.
        String CONFIGSET = "ConfigSet";

        // If you're using Amazon SES in a region other than US West (Oregon), 
        // replace email-smtp.us-west-2.amazonaws.com with the Amazon SES SMTP  
        // endpoint in the appropriate AWS Region.
        String HOST = "smtp-relay.sendinblue.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.
        int PORT = 587;

        // The subject line of the email
        String SUBJECT =
            "Amazon SES test (SMTP interface accessed using C#)";

        // The body of the email
        String BODY =
            "<h1>Amazon SES Test</h1>" +
            "<p>This email was sent through the " +
            "<a href='https://aws.amazon.com/ses'>Amazon SES</a> SMTP interface " +
            "using the .NET System.Net.Mail library.</p>";

        // Create and build a new MailMessage object
        MailMessage message = new MailMessage();
        message.IsBodyHtml = true;
        message.From = new MailAddress(FROM, FROMNAME);
        message.To.Add(new MailAddress(TO));
        message.Subject = SUBJECT;
        message.Body = BODY;
        // Comment or delete the next line if you are not using a configuration set
        message.Headers.Add("X-SES-CONFIGURATION-SET", CONFIGSET);

        using (var client = new System.Net.Mail.SmtpClient(HOST, PORT))
        {
            // Pass SMTP credentials
            client.Credentials =
                new NetworkCredential(SMTP_USERNAME, SMTP_PASSWORD);

            // Enable SSL encryption
            client.EnableSsl = true;

            // Try to send the message. Show status in console.
            try
            {
                Console.WriteLine("Attempting to send email...");
                client.Send(message);
                Console.WriteLine("Email sent!");
            }
            catch (Exception ex)
            {
                Console.WriteLine("The email was not sent.");
                Console.WriteLine("Error message: " + ex.Message);
            }
        }
    }
}

}