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undeliverable email RRS feed

  • Question

  • When forwarding an email with a youtube attachment I sometimes get this message and wonder why.

    The following recipient(s) could not be reached:

    xxxxx on 8/9/2011 7:49 PM

    421 Service not available ; Closing transmission

    Wednesday, August 10, 2011 12:30 AM

Answers

  • Hi duxiedodie,

    Could you please post more information about the issue? Such as Rich referred.
    Just for the information, it maybe caused by many reasons, some suggestions for you:
    1. Confirm whether the issue just happen to on the special recipients
    2. If 1 is true, use telent to the special domain, confirm that whether there are some failed information
    3. Confirm whether the recepient domain listed in the blacklist on the internet
    4. Use other mailbox, such as hotmail to send email to the recepient to make some tests, post the result
    5. It is better to retrieve some smtp log about the issue, and confirm the issue

    Regards!
    Gavin
     

    • Marked as answer by Gavin-Zhang Thursday, August 18, 2011 2:23 AM
    Saturday, August 13, 2011 12:49 PM

All replies

  • On Wed, 10 Aug 2011 00:30:12 +0000, duxiedodie wrote:
     
    >
    >
    >When forwarding an email with a youtube attachment I sometimes get this message and wonder why.
    >
    >The following recipient(s) could not be reached:
    >
    >xxxxx on 8/9/2011 7:49 PM
    >
    >421 Service not available ; Closing transmission
     
    How soon after you send the message do you get this? A 421 is a
    retryable error, so on an Exchange server with a default configuration
    you shouldn't get a NDR for two days.
     
    ---
    Rich Matheisen
    MCSE+I, Exchange MVP
     

    --- Rich Matheisen MCSE+I, Exchange MVP
    Wednesday, August 10, 2011 2:11 AM
  • Hi duxiedodie,

    Could you please post more information about the issue? Such as Rich referred.
    Just for the information, it maybe caused by many reasons, some suggestions for you:
    1. Confirm whether the issue just happen to on the special recipients
    2. If 1 is true, use telent to the special domain, confirm that whether there are some failed information
    3. Confirm whether the recepient domain listed in the blacklist on the internet
    4. Use other mailbox, such as hotmail to send email to the recepient to make some tests, post the result
    5. It is better to retrieve some smtp log about the issue, and confirm the issue

    Regards!
    Gavin
     

    • Marked as answer by Gavin-Zhang Thursday, August 18, 2011 2:23 AM
    Saturday, August 13, 2011 12:49 PM