SocketException:没有这样的主机

时间:2017-09-10 05:50:19

标签: c# sockets asp.net-core mailkit discountasp

在我ASP.NET Core 1.1.1开发的VS2017 Ver 15.3.3应用中,我使用Account confirmation and password recovery in ASP.NET CoreMailKit来实现上述文章的功能,但我&#39 ; m收到以下错误:

注意

  1. 错误发生在以下await client.ConnectAsync("smtp.relay.uri", 25, SecureSocketOptions.None).ConfigureAwait(false);方法的行SendEmailAsync(...)
  2. await _emailSender.SendEmailAsync(model.Email, "Confirm your account", $"Please confirm your account by clicking this link: <a href='{callbackUrl}'>link</a>");帖子方法的Register(...)行也显示如下:
  3. 错误

      

    SocketException:没有这样的主机

    MessageServices.cs类

    public class AuthMessageSender : IEmailSender, ISmsSender
    {
        public async Task SendEmailAsync(string email, string subject, string message)
        {
            // Plug in your email service here to send an email.
            //return Task.FromResult(0);
            var emailMessage = new MimeMessage();
    
            //You can if required (and I have done in my code) set the LocalDomain used when communicating with the SMTP server
            //This will be presented as the origin of the emails. In my case I needed to supply the domain so that our internal testing SMTP server would accept and relay my emails.
            //We then asynchronously connect to the SMTP server. The ConnectAsync method can take just the uri of the SMTP server or as I’ve done here be overloaded with a port and SSL option. For my case when testing with our local test SMTP server no SSL was required so I specified this explicitly to make it work.
            emailMessage.From.Add(new MailboxAddress("MyName", "MyEmail@MyDomain.com"));
            emailMessage.To.Add(new MailboxAddress("", email));
            emailMessage.Subject = subject;
            emailMessage.Body = new TextPart("plain") { Text = message };
    
            using (var client = new SmtpClient())
            {
                client.LocalDomain = "smtp.MyDomain.com";
                await client.ConnectAsync("smtp.relay.uri", 25, SecureSocketOptions.None).ConfigureAwait(false);
                await client.SendAsync(emailMessage).ConfigureAwait(false);
                await client.DisconnectAsync(true).ConfigureAwait(false);
            }
        }
    

    在AccountController.cs中注册post方法

    [HttpPost]
    [AllowAnonymous]
    [ValidateAntiForgeryToken]
    public async Task<IActionResult> Register(RegisterViewModel model, string returnUrl = null)
    {
        ViewData["ReturnUrl"] = returnUrl;
        if (ModelState.IsValid)
        {
            var user = new ApplicationUser { UserName = model.Email, Email = model.Email };
            var result = await _userManager.CreateAsync(user, model.Password);
            if (result.Succeeded)
            {
                // For more information on how to enable account confirmation and password reset please visit https://go.microsoft.com/fwlink/?LinkID=532713
                // Send an email with this link
                var code = await _userManager.GenerateEmailConfirmationTokenAsync(user);
                var callbackUrl = Url.Action(nameof(ConfirmEmail), "Account", new { userId = user.Id, code = code }, protocol: HttpContext.Request.Scheme);
                await _emailSender.SendEmailAsync(model.Email, "Confirm your account",
                    $"Please confirm your account by clicking this link: <a href='{callbackUrl}'>link</a>");
                await _signInManager.SignInAsync(user, isPersistent: false);
                _logger.LogInformation(3, "User created a new account with password.");
                return RedirectToLocal(returnUrl);
            }
            AddErrors(result);
        }
    

    更新

    不确定,但错误可能与我没有正确使用我的电子邮件主机信息有关:

    1. 我正在使用网站/电子邮件托管公司DiscountASP.NET的网络邮件功能。他们为每个订户的SMTP服务器名称是smtp.YourDomainName.com。因此,在上面的SendEmailAsync(...)方法中,我使用client.LocalDomain = "smtp.MyDomain.com";
    2. 对于MailKit实施,请关注this文章的Sending email via a SMTP server部分。

1 个答案:

答案 0 :(得分:0)

打开您的cmd并为Windows编写ipconfig / all并搜索您的PC的主机名hostname in console 然后在此功能中输入您的主机名

using (var client = new SmtpClient())
    {
        client.LocalDomain = "smtp.MyDomain.com";
        await client.ConnectAsync("YourHostName", 25,false);
        await client.SendAsync(emailMessage).ConfigureAwait(false);
        await client.DisconnectAsync(true).ConfigureAwait(false);
    }