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2 de fev. de 2022 · As the error explicitly states, SMTP authentication is disabled. It even provides you with a very helpful link to https://aka.ms/smtp_auth_disabled . The link explains how to enable SMTP AUTH for the whole organization or only for some mailboxes.
- Overview
- Disable SMTP AUTH in your organization
- Enable SMTP AUTH for specific mailboxes
SMTP client email submissions (also known as authenticated SMTP submissions or SMTP AUTH) are used in the following scenarios in Office 365 and Microsoft 365:
•POP3 and IMAP4 clients. These protocols only allow clients to receive email messages, so they need to use authenticated SMTP to send email messages.
•Applications, reporting servers, and multifunction devices that generate and send email messages.
The SMTP AUTH protocol is used for SMTP client email submissions, typically on TCP port 587. SMTP AUTH supports modern authentication (Modern Auth) through OAuth in addition to basic authentication. For more information, see Authenticate an IMAP, POP or SMTP connection using OAuth.
Virtually all modern email clients that connect to Exchange Online mailboxes in Office 365 or Microsoft 365 (for example, Outlook, Outlook on the web, iOS Mail, Outlook for iOS and Android, etc.) don't use SMTP AUTH to send email messages.
Therefore, we highly recommend that you disable SMTP AUTH in your Exchange Online organization, and enable it only for the accounts (mailboxes) that still require it. There are two settings that can help you do this:
You can disable (or enable) SMTP AUTH globally for your organization in the EAC or by using Exchange Online PowerShell.
To disable SMTP AUTH globally in your organization in the EAC, go to the Mail Flow settings page in the Settings and toggle the setting labeled Turn off SMTP AUTH protocol for your organization.
Use the Microsoft 365 admin center to enable or disable SMTP AUTH on specific mailboxes
1.Open the Microsoft 365 admin center and go to Users > Active users. 2.Select the user, and in the flyout that appears, select Mail. 3.In the Email apps section, select Manage email apps. 4.Verify the Authenticated SMTP setting: unchecked = disabled, checked = enabled. 5.When you're finished, select Save changes.
Use Exchange Online PowerShell to enable or disable SMTP AUTH on specific mailboxes
Use the following syntax: The value $null indicates the setting for the mailbox is controlled by the global setting on the organization. You use the values $true (disabled) or $false (enabled) to override the organization setting. The mailbox setting takes precedence over the organization setting. This example enables SMTP AUTH for mailbox sean@contoso.com. This example disables SMTP AUTH for mailbox chris@contoso.com.
Use Exchange Online PowerShell to enable or disable SMTP AUTH on multiple mailboxes
Use a text file to identify the mailboxes. Values that don't contain spaces (for example, alias, email address, or account name) work best. The text file must contain one mailbox on each line like this: The syntax uses the following two commands (one to identify the mailboxes, and the other to enable SMTP AUTH for those mailboxes): This example enables SMTP AUTH for the mailboxes specified in the file C:\My Documents\Allow SMTP AUTH.txt.
7 de out. de 2021 · Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant. Visit https://aka.ms/smtp_auth_disabled for more information.
Using Outlook 365 to send emails on a Microsoft Exchange and in a 3rd party app I get this message: Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant.
20 de ago. de 2021 · Getting "SmtpClientAuthentication is disabled for the Tenant" error in Send-MailMessage cmdlet? Here is how to enable SMTP for Office 365!
13 de ago. de 2021 · Avoid using aliases or nicknames. Password: Check for typos and ensure you're using the app password generated specifically for SMTP access, not your regular Microsoft account password. Two-Factor Authentication (MFA): If using MFA, double-check the app password is generated and entered correctly.
Por exemplo, nos dois primeiros pedidos na captura de tela abaixo, você pode ver uma mensagem de erro que diz “Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant”. Um exemplo da mensagem de erro quando você não ativou o SMTP Authenticated
