Clearing the Security Breach Alert

If you're contacting us because you're unable to clear the security breach alert, click the X in the upper-right hand corner or press the escape key on your keyboard to clear the message. This should clear the alert and allow you to view your mail.

Error: 554 Message not allowed - [numeric code]

You'll receive an SMTP error or failed delivery message that includes "554 Message not allowed" when the content of a message you're trying to send violates Yahoo Mail policies. Content that violates policies includes; objectionable links, malicious attachments, or bad header information.

Review the Yahoo Mail and Yahoo Messenger Terms of Service to learn more about Yahoo policies that can effect your ability to send messages to Yahoo Mail accounts. 

If you're the administrator for the mail server in question, review your outgoing messages for obectionable content or practices.

Note: Yahoo is unable to disclose specific information regarding our filtering practices.

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