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在我ASP.NET Core 1.1.1开发的应用程序中VS2017 Ver 15.3.3，我使用ASP.NET Core和MailKit中的帐户确认和密码恢复来实现上述文章的功能，但出现以下错误：

注意：

  1. 错误发生在下面await client.ConnectAsync("smtp.relay.uri", 25, SecureSocketOptions.None).ConfigureAwait(false);的SendEmailAsync(...)方法行和
  2. 在 post 方法的行await _emailSender.SendEmailAsync(model.Email, "Confirm your account", $"Please confirm your account by clicking this link: <a href='{callbackUrl}'>link</a>");也Register(...)如下所示：

错误

SocketException：没有这样的主机是已知的

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，但该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。每个订阅者的 SMTP 服务器名称是 smtp.YourDomainName.com。因此，在上述SendEmailAsync(...)方法中，我使用client.LocalDomain = "smtp.MyDomain.com";
  2. 对于 MailKit 实现，我将关注本文Sending email via a SMTP server的部分内容。
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1 回答 1

0

打开您的cmd并为windows编写ipconfig /all并搜索您PC的主机名，控制台中的主机名 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);
    }

于 2020-05-30T18:04:15.233 回答