Question

当我尝试使用C＃代码发送邮件时，我收到“服务不可用，关闭传输通道。服务器响应是：达到错误限制”。

try
{
    MailMessage emailMessage = new MailMessage();

    emailMessage.Subject = "smth subject";

    messages = string.Empty;

    string serverName = System.Environment.MachineName;
    string serverIpAddress = Dns.GetHostAddresses(Environment.MachineName)
                                .First(ip => ip.AddressFamily == AddressFamily.InterNetwork).ToString();

    string serverNameWithDetails = Settings.Default.ServiceDisplayName + " (server's name: " + serverName + ", server's ip address: " + serverIpAddress + ")";

    emailMessage.IsBodyHtml = true;
    emailMessage.Body = "smth body";
    emailMessage.From = new MailAddress(config.SmtpUser);
    emailMessage.To.Add("myAddress@aaa.com");

    // Set encoding
    emailMessage.HeadersEncoding = System.Text.Encoding.UTF8;
    emailMessage.BodyEncoding = System.Text.Encoding.UTF8;

    SmtpClient smtpClient = new SmtpClient(config.SmptHost, config.SmptPort);

    NetworkCredential smtpUserInfo = new System.Net.NetworkCredential(config.SmtpUser, config.SmtpPassword);
    smtpClient.UseDefaultCredentials = false;
    smtpClient.Credentials = smtpUserInfo;

    smtpClient.Send(emailMessage);

    EmailSent = true;
}
catch (Exception e)
{
    log.ErrorFormat("The following error occured while building and sending the email: {0}", e.Message);
}

所以e.Message是上面写的错误，但我找不到有关此错误消息的任何信息。它在执行smtpClient.Send(emailMessage);行时进入catch部分。谁能帮我？抱歉我的英语不好。

Answer 1

根据我的经验

服务不可用，关闭传输通道。服务器响应为：达到错误限制

如果您尝试发送大量电子邮件，则会被触发 - 声音逻辑正确： - ）

棘手的部分是某些ISP的限制可能非常低（20 - 500个不同的邮件/小时），如果您将发件人声明为未注册的电子邮件，则在邮件服务器上，限制可以为0 ，然后触发此类错误消息。

我的观点是：使用在邮件服务器上注册的电子邮件，并注意限制，在某些情况下，只需在调试时运行代码即可达到这些限制。

Answer 2

尝试thiz ..

using System.Net;
using System.Net.Mail; 
string to = strSidMail;
string from = "rajeeshmenoth@wordpress.com";

MailMessage message = new MailMessage(from, to);
message.Subject = txt_subject.text;
message.Body = mailbody;
message.BodyEncoding = Encoding.UTF8;
message.IsBodyHtml = true;
SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
System.Net.NetworkCredential basicCredential1 = new
System.Net.NetworkCredential("yourgmail id", "Password");
client.EnableSsl = true;
client.UseDefaultCredentials = false;
client.Credentials = basicCredential1;   
try
{
client.Send(message);
}
catch (Exception ex)
{
throw ex;
}

尝试使用SmtpClient发送电子邮件时出现“达到错误限制”

2 个答案: