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The message has more than 200 SMTP envelope recipients from the same domain.Īn envelope recipient is the original, unexpanded recipient that's used in the RCPT TO command to transmit the message between SMTP servers.
#EMAIL FACEBOOK NOTIFIER DEFERRED EMAILS CODE#
If the receiving server is available, the message is delivered.įor more information, see Fix email delivery issues for error code 4.4.7 in Exchange Online. If you send the message again, it's placed in the queue again. You might have to reduce the number of recipients in the message header for the host about which you're receiving this error.
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Check the validity of the recipient address, and determine if the receiving server is configured correctly to receive messages. This message usually indicates an issue on the receiving server. This message can also indicate that a message header limit has been reached on a remote server, or some other protocol time-out occurred while communicating with the remote server. The sending server tried to relay or deliver the message, but the action wasn't completed before the message expiration time occurred. The error should also include the IP address of the server or service that's generating the error, which you can use to identify the party responsible for fixing this. This error almost always indicates an issue with the receiving server or network outside of Microsoft 365 or Office 365. Microsoft 365 or Office 365 is trying to send a message to an email server outside of Microsoft 365 or Office 365, but attempts to connect to it are failing due to a network connection issue at the external server's location.
#EMAIL FACEBOOK NOTIFIER DEFERRED EMAILS DRIVER#
This is done so a single recipient's mail processing doesn't unfairly impact other recipients sharing the same mailbox database.įor more information about this by-design throttling, see Store Driver Fault Isolation Improvements in Exchange 2010 SP1.Ĭonnection refused The recipient mailbox's ability to accept messages is being throttled because it's receiving too many messages too quickly. STOREDRV.Deliver recipient thread limit exceeded The following table contains the error codes (also called enhanced status codes) for the most common bounce messages and errors that you might encounter in Exchange Online. Find my error code and get help delivering my email NDRs include an error code that indicates why your email wasn't delivered, solutions to help you get your email delivered, a link to more help on the web, and technical details for administrators.
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Non-delivery can be caused by something as simple as a typo in an email address.
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The most common type is called a non-delivery report (NDR) and they tell you that a message wasn't delivered. The email you receive is a delivery status notification, also known as a DSN or bounce message. When there's a problem delivering an email message that you sent, Microsoft 365 or Office 365 will generate an error code and often will send an email to let you know.