[尝试使用SmtpClient从c#中的Winforms应用发送电子邮件。通过该MS article,它应该可以工作。我搜索了很多论坛等,但没有找到任何解决方案。该错误消息似乎表明客户端未通过身份验证。密码是正确的,我已经以该用户身份使用密码登录并可以使用。 2FA已启用,但htis应该不会妨碍它?
我检查过的东西就位
代码
var userName = "[email protected]";
var password = "password";
var msg = new MailMessage();
msg.To.Add(new MailAddress("[email protected]"));
msg.From = new MailAddress(userName);
msg.Subject = "Test Office 365 Account";
msg.Body = "Testing email using Office 365 account.";
msg.IsBodyHtml = true;
var client = new SmtpClient{
Host = "smtp.office365.com",
Credentials = new System.Net.NetworkCredential(userName, password),
Port = 587,
DeliveryMethod = SmtpDeliveryMethod.Network,
EnableSsl = true
};
client.Send(msg);
Exception
邮件工具包的实现
var message = new MimeMessage(); message.From.Add(new MailboxAddress("Test User", "[email protected]")); message.To.Add(new MailboxAddress("Gmail User", "[email protected]")); message.Subject = "test"; message.Body = new TextPart("plain") { Text = @"test" }; var client = new SmtpClient(new ProtocolLogger("imap.log")); // For demo-purposes, accept all SSL certificates (in case the server supports STARTTLS) client.ServerCertificateValidationCallback = (s, c, h, e) => true; client.Connect("smtp.office365.com", 587, SecureSocketOptions.Auto); //this is fine and it connects var clientAuthenticationMechanisms = client.AuthenticationMechanisms; client.AuthenticationMechanisms.Remove("XOAUTH2"); // Note: only needed if the SMTP server requires authentication client.Authenticate("[email protected]", "password"); // this is where it fails with Authentication Failure client.Send(message); client.Disconnect(true);
邮件工具记录输出
Connected to smtp://smtp.office365.com:587/?starttls=when-available
S: 220 SYCP282CA0015.outlook.office365.com Microsoft ESMTP MAIL Service ready at Mon, 25 Nov 2019 04:49:36 +0000
C: EHLO [192.168.2.50]
S: 250-SYCP282CA0015.outlook.office365.com Hello [58.6.92.82]
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 [192.168.2.50]
S: 250-SYCP282CA0015.outlook.office365.com Hello [58.6.92.82]
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
REMOVED BASE64 DATA (password, login)
S: 535 5.7.3 Authentication unsuccessful [SYCP282CA0015.AUSP282.PROD.OUTLOOK.COM]
[尝试使用SmtpClient从c#中的Winforms应用发送电子邮件。通过这篇MS文章,它应该可以工作。我搜索了很多论坛等,但没有找到任何解决方案。错误消息...
已解决。正是2FA阻止了它的发生。把它关掉就可以了