What does 550 relay not permitted mean in Outlook?

A “550 Authentication is required for relay” error indicates that your email server requires SMTP authentication in order to send outgoing mail, but the email client used to send email has not been authenticated with your username and password.

What does relay not permitted mean?

When a user receives a 550 relay not permitted error, it means they are not permitted to send an email via the server that they are attempting to send an email from. When users send an email from their Internet Service Providers (ISP) mail servers, they generally do not have to authenticate themselves.

How do I fix 550 Please turn on SMTP authentication in your mail client?

Type “Email Routing” in the search bar or find it in the “Email” section. On the next page, choose your domain from the drop-down list. Once you’ve selected the domain, you will want to make sure it’s set to “local mail exchanger”, then click change.

What is a 550 error?

550 Blocked error or 550 Requested action not taken: mailbox unavailable is an SMTP (Simple Mail Transfer Protocol) error code. Put simply, this message means that the email you sent was blocked by the recipient’s email hosting server, and returned to you.

What does require authentication to send emails mean?

Email authentication is a technical solution to proving that an email is not forged. In other words, it provides a way to verify that an email comes from who it claims to be from. Email authentication is most often used to block harmful or fraudulent uses of email such as phishing and spam.

How do I enable SMTP Authentication in Outlook mail client?

Start Outlook.

  1. On the Tools menu, click Account Settings.
  2. Select the email account from the list and click Change.
  3. On the Change E-mail Settings window, click More Settings.
  4. Click the Outgoing Server tab and check the My outgoing server (SMTP) requires authentication option.

How do I enable SMTP Authentication in mail client?

Enable SMTP AUTH for 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, click Mail.
  3. In the Email apps section, click Manage email apps.
  4. Verify the Authenticated SMTP setting: unchecked = disabled, checked = enabled.

What is the correct SMTP for Hotmail?

Hotmail SMTP Server: smtp-mail.outlook.com. Hotmail SMTP Port: 587.