本地客户端上用于SMTP的Office 365 XOAUTH2 535 5.7.3身份验证不成功

Question

我尝试通过office365的smtp发送邮件。我在azure中为本地客户端设置了一个应用程序注册，并设置了权限smtp.send。但当我连接时，我已经能够获得令牌，但发送不起作用。

在我阅读的所有其他文章中，我需要设置https://outlook.office.com/SMTP.Send'，但我找不到任何方法在Azure Active Directory中我的应用程序的API权限中设置它。我只能为Graph设置ifhttps://graph.microsoft.com/SMTP.Send'或Exchange'https://ps.outlook.com/Mail.Send.All'.

我忽略了什么吗？如果有人能给我一个提示，那真的很棒吗？或者也许本地客户不可能？

下面是我获取访问凭证的代码:

var cca = ConfidentialClientApplicationBuilder
    .Create("---")
    .WithClientSecret("----")
    .WithTenantId("----").Build();
var ewsScopes = new List<string>() { "https://outlook.office365.com/.default" };
var authResult = cca.AcquireTokenForClient(ewsScopes).ExecuteAsync().GetAwaiter().GetResult();
string xoauthKey = OAuth2.GetXOAuthKeyStatic(fromAddress, authResult.AccessToken);

// content of xoauthKey:
// user=my-testmailAccount�auth=Bearer eyJ0eXAiOiJKV1QiLCJub25jZSI6IjR....��

我使用mailbee或maikit来发送邮件。

这是smtp日志：

[15:41:09.26] [INFO] Assembly version: 11.0.0 build 569 for .NET 4.5.
[15:41:09.26] [INFO] Will test sending mail message.
[15:41:09.32] [INFO] Will resolve host "smtp.office365.com".
[15:41:09.33] [INFO] Host "smtp.office365.com" resolved to IP address(es) 52.97.151.146, 52.98.208.82, 52.98.212.194, 52.97.137.66.
[15:41:09.33] [INFO] Will connect to host "smtp.office365.com" on port 587.
[15:41:09.35] [INFO] Socket connected to IP address 52.97.151.146 on port 587.
[15:41:09.38] [RECV] 220 AM6P194CA0020.outlook.office365.com Microsoft ESMTP MAIL Service ready at Mon, 16 May 2022 13:41:09 +0000\r\n
[15:41:09.38] [INFO] Connected to mail service at host "smtp.office365.com" on port 587 and ready.
[15:41:09.38] [INFO] Will send Hello command (HELO or EHLO).
[15:41:09.38] [SEND] EHLO [10.0.0.4]\r\n
[15:41:09.40] [RECV] 250-AM6P194CA0020.outlook.office365.com Hello [20.113.132.65]\r\n250-SIZE 157286400\r\n250-PIPELINING\r\n250-DSN\r\n250-ENHANCEDSTATUSCODES\r\n250-STARTTLS\r\n250-8BITMIME\r\n250-BINARYMIME\r\n250-CHUNKING\r\n250 SMTPUTF8\r\n
[15:41:09.41] [INFO] SMTP Hello completed.
[15:41:09.41] [INFO] Notify server that we are ready to start TLS/SSL negotiation.
[15:41:09.41] [SEND] STARTTLS\r\n
[15:41:09.43] [RECV] 220 2.0.0 SMTP server ready\r\n
[15:41:09.43] [INFO] Will start TLS/SSL negotiation sequence.
[15:41:09.47] [INFO] TLS/SSL negotiation completed.
[15:41:09.47] [INFO] Will send Hello command (HELO or EHLO).
[15:41:09.48] [SEND] EHLO [10.0.0.4]\r\n
[15:41:09.49] [RECV] 250-AM6P194CA0020.outlook.office365.com Hello [20.113.132.65]\r\n250-SIZE 157286400\r\n250-PIPELINING\r\n250-DSN\r\n250-ENHANCEDSTATUSCODES\r\n250-AUTH LOGIN XOAUTH2\r\n250-8BITMIME\r\n250-BINARYMIME\r\n250-CHUNKING\r\n250 SMTPUTF8\r\n
[15:41:09.49] [INFO] SMTP Hello completed.
[15:41:09.49] [INFO] Will login as "my-testmailAccount".
[15:41:09.50] [INFO] Will try SASL XOAUTH2 authentication method.
[15:41:09.50] [SEND] AUTH XOAUTH2\r\n
[15:41:09.51] [RECV] 334 \r\n
[15:41:09.52] [SEND] ********\r\n
[15:41:15.15] [RECV] 535 5.7.3 Authentication unsuccessful [AM6P194CA0020.EURP194.PROD.OUTLOOK.COM]\r\n
[15:41:15.17] [INFO] Will disconnect from host "smtp.office365.com".
[15:41:15.17] [INFO] Disconnected from host "smtp.office365.com".
[15:41:15.17] [INFO] Error: The server has rejected authentication data sent by the client. The server responded: 535 5.7.3 Authentication unsuccessful [AM6P194CA0020.EURP194.PROD.OUTLOOK.COM].

Answer 1

您可能已关闭SMTP身份验证。

• 转到：https://admin.microsoft.com/ 并登录。
• 用户

从https://afterlogic.com/mailbee-net/docs/#OAuth2Office365RegularAccountsInstalledApps.html