mailkit - 将smtp4dev用作Mailkit客户端消息的服务器的推荐方法

Question

我有一个控制台应用程序，并且安装了mailkit软件包以用于消息传递目的。

我在测试mailkit smtp客户端的主要方法中有代码。我正在运行smtp4dev虚拟服务器，并且客户端代码是带有注释身份验证部分的example code of mailkit in github，主机是localhost和端口26，与smtp4dev配置匹配。

当执行客户端代码时，smtp4dev stop running和未处理的异常发生IOException: Unable to read data from the transport connection: an existing connection was forcibly closed by the remote host.
如何配置smtp4dev从mailkit客户端接收消息？

Answer 1

经过一番尝试和错误，我在以下安排上取得了成功。


我的代码类似于https://github.com/jstedfast/MailKit#sending-messages:

public void DoMail()
{
    var message = new MimeMessage();
    message.From.Add(new MailboxAddress("Joey", "joey@friends.com"));
    message.To.Add(new MailboxAddress("Alice", "alice@wonderland.com"));
    message.Subject = "How you doin?";

    message.Body = new TextPart("plain")
    {
        Text = @"Hey Alice,

What are you up to this weekend? Monica is throwing one of her parties on
Saturday and I was hoping you could make it.

Will you be my +1?

-- Joey
"
    };

    using (var client = new SmtpClient())
    {
        // For demo-purposes, accept all SSL certificates (in case the server supports STARTTLS)
        client.ServerCertificateValidationCallback = (s, c, h, e) => true;

        client.Connect("localhost", 25, false);

        // Note: since we don't have an OAuth2 token, disable
        // the XOAUTH2 authentication mechanism.
        client.AuthenticationMechanisms.Remove("XOAUTH2");

        // Note: only needed if the SMTP server requires authentication
        //client.Authenticate("joey", "password");

        client.Send(message);
        client.Disconnect(true);
    }
}

对于无法访问imgur的用户:
域名:localhost
监听界面:0.0.0.0
端口号:25(不过，在Dalsier的情况下，Dalsier会使用26)
扩充功能:

[]隐式SSL/TLS

[x] 8BITMIME

[] STARTTLS

[] AUTH

[x]大小

SSL/TLS证书:无
SSL/TLS证书密码:无
最大邮件大小(字节):0
接收超时(毫秒):30000
选项:

[]需要认证

[]需要安全连接

[]仅允许通过安全连接进行明文身份验证