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Where do returned messages go?

When a message is returned as "Undeliverable" due to excessive file size, does the receiving server save a copy? Site expert David Sengupta explains what happens to these bounced e-mails.

When a message is returned "Undeliverable, user mailbox cannot accept messages over 2 MB," where does the message go? The recipient did not get the message. Does it stay on the receiver's server or does it bounce back completely?
The message is accepted by the receiving server, then the mailbox quota is checked and then the message is sent back undeliverable. If administrator notifications have been defined then the administrator on the intended recipient side of the SMTP transaction may be getting a copy of the undeliverable notification.

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Related information from SearchExchange.com:

  • Tip: Dealing with undeliverable messages in Exchange Server
  • Tip: Stripping attachments from non-delivery reports
  • Reference Center: Non-Delivery Reports (NDRs)

  • Dig Deeper on Exchange Server setup and troubleshooting

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