使用 MailKit 通过 Outlook.com 发送

RHa*_*ris 5 outlook.com mailkit asp.net-core

我正在尝试使用 MailKit 通过我的 Outlook.com 电子邮件地址发送电子邮件。

我遵循了我在网上看到的所有示例,这就是我所拥有的:

public async Task SendEmailAsync(string email, string subject, string htmlmessage)
{
    var message = new MimeMessage();
    message.From.Add(new MailboxAddress("Service Account", "me@outlook.com"));
    message.To.Add(new MailboxAddress("First Last", email));
    message.Subject = subject;
    message.Body = new TextPart(TextFormat.Html)
    {
        Text = htmlMessage
    };

    using (var client = new SmtpClient())
    {
        //Have tried both false and true    
        client.Connect("smtp-mail.outlook.com", 587, false);
        client.AuthenticationMechanisms.Remove("XOAUTH2");
        client.Authenticate("me@outlook.com", "mypassword");
        await client.SendAsync(message);
        client.Disconnect(true);
    }

    return;
}
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如果我将useSSL参数设置为trueon client.Connect(),则会出现此错误:

An error occurred while attempting to establish an SSL or TLS connection
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如果我将useSSL参数设置为false,则会出现此错误:

AuthenticationException: AuthenticationInvalidCredentials: 5.7.3 Authentication unsuccessful
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我究竟做错了什么?

更新

ProtocolLogger根据@jstedfast 的建议添加,结果如下:

Connected to smtp://smtp-mail.outlook.com:587/?starttls=when-available
S: 220 BN6PR11CA0009.outlook.office365.com Microsoft ESMTP MAIL Service ready at Sun, 10 Feb 2019 03:26:30 +0000
C: EHLO [192.168.1.12]
S: 250-BN6PR11CA0009.outlook.office365.com Hello [73.175.143.94]
S: 250-SIZE 157286400
S: 250-PIPELINING
S: 250-DSN
S: 250-ENHANCEDSTATUSCODES
S: 250-STARTTLS
S: 250-8BITMIME
S: 250-BINARYMIME
S: 250-CHUNKING
S: 250 SMTPUTF8
C: STARTTLS
S: 220 2.0.0 SMTP server ready
C: EHLO [192.168.1.12]
S: 250-BN6PR11CA0009.outlook.office365.com Hello [73.175.143.94]
S: 250-SIZE 157286400
S: 250-PIPELINING
S: 250-DSN
S: 250-ENHANCEDSTATUSCODES
S: 250-AUTH LOGIN XOAUTH2
S: 250-8BITMIME
S: 250-BINARYMIME
S: 250-CHUNKING
S: 250 SMTPUTF8
C: AUTH LOGIN
S: 334 ************
C: ****************
S: 334 ************
C: ****************
S: 535 5.7.3 Authentication unsuccessful [BN6PR11CA0009.namprd11.prod.outlook.com]
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顺便说一句,我用*. 我不确定那是什么以及它是否敏感。

RHa*_*ris 2

看起来代码本身就可以工作了。但是,请注意,如果您已将帐户设置为需要 2FA,您将收到上述错误消息,指示您的凭据无效。请务必禁用 2FA!