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Exchange Attachment Size Limit Undeliverable Notifications RRS feed

  • Question

  • Hello,

    We are still on Exchange 2003. I have been told that not all senders who are sending email  to us over our attachment size limit (10MB) are getting the delivery status notification 5.2.3 email, so they never know that the email wasn't delivered.

    I sent large test messages from gmail and yahoo accounts and did receive the NDR report.

    My question is,   is this a problem on our end or is it a problem on the receiving end. Maybe they are blocking NDRs?

    I can't seem to find much help googling so if someone could give me a quick reply I would really appreciate it.


    Thanks.
    Thursday, March 10, 2011 8:16 PM

Answers

  • If you send a large attachment to another internal user do you get an NDR? Can you see if you disable NDRs?

    How to control non-delivery reports when you use Exchange 2000 or Exchange 2003
    http://support.microsoft.com/kb/294757


    James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com
    • Marked as answer by emma.yoyo Thursday, March 17, 2011 4:24 AM
    Friday, March 11, 2011 12:20 AM
  • On Thu, 10 Mar 2011 20:15:49 +0000, shamrock0 wrote:
     
    >We are still on Exchange 2003. I have been told that not all senders who are sending email to us over our attachment size limit (10MB) are getting the delivery status notification 5.2.3 email, so they never know that the email wasn't delivered.
    >
    >I sent large test messages from gmail and yahoo accounts and did receive the NDR report.
    >
    >My question is, is this a problem on our end or is it a problem on the receiving end. Maybe they are blocking NDRs?
    >
    >I can't seem to find much help googling so if someone could give me a quick reply I would really appreciate it.
     
    If the sender uses ESMTP they'll see the "SIZE" keyword in your
    server's set of advertised keywords. If the sender's intellegent it
    won't try to send an e-mail larger than that limit. If they do do, and
    they include the "SIZE=xxx" in the MAIL FROM command your server will
    reject the MAIL FROM and the sending SMTP server will generate the NDR
    -- that part's out of your control.
     
    If they use SMTP to send the e-mail there's no way to know beforehand
    if a message exceeds your limts so the message is sent and your server
    sends a NDR -- if you haven't disabled sending NDRs to the Internet.
    Whether the sending system accepts your NDR is also something that's
    out of your control.
     
    Your SMTP protocol log and your applications log shold inform you of
    your server's action.
     
    ---
    Rich Matheisen
    MCSE+I, Exchange MVP
     

    --- Rich Matheisen MCSE+I, Exchange MVP
    • Marked as answer by emma.yoyo Thursday, March 17, 2011 4:24 AM
    Friday, March 11, 2011 1:02 AM

All replies

  • Hello,

    We are still on Exchange 2003. I have been told that not all senders who are sending email  to us over our attachment size limit (10MB) are getting the delivery status notification 5.2.3 email, so they never know that the email wasn't delivered.

    I sent large test messages from gmail and yahoo accounts and did receive the NDR report.

    My question is,   is this a problem on our end or is it a problem on the receiving end. Maybe they are blocking NDRs?

    I can't seem to find much help googling so if someone could give me a quick reply I would really appreciate it.


    Thanks.

    • Merged by emma.yoyo Tuesday, March 15, 2011 6:48 AM duplicate
    Thursday, March 10, 2011 8:15 PM
  • If you send a large attachment to another internal user do you get an NDR? Can you see if you disable NDRs?

    How to control non-delivery reports when you use Exchange 2000 or Exchange 2003
    http://support.microsoft.com/kb/294757


    James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com
    • Marked as answer by emma.yoyo Thursday, March 17, 2011 4:24 AM
    Friday, March 11, 2011 12:20 AM
  • On Thu, 10 Mar 2011 20:15:49 +0000, shamrock0 wrote:
     
    >We are still on Exchange 2003. I have been told that not all senders who are sending email to us over our attachment size limit (10MB) are getting the delivery status notification 5.2.3 email, so they never know that the email wasn't delivered.
    >
    >I sent large test messages from gmail and yahoo accounts and did receive the NDR report.
    >
    >My question is, is this a problem on our end or is it a problem on the receiving end. Maybe they are blocking NDRs?
    >
    >I can't seem to find much help googling so if someone could give me a quick reply I would really appreciate it.
     
    If the sender uses ESMTP they'll see the "SIZE" keyword in your
    server's set of advertised keywords. If the sender's intellegent it
    won't try to send an e-mail larger than that limit. If they do do, and
    they include the "SIZE=xxx" in the MAIL FROM command your server will
    reject the MAIL FROM and the sending SMTP server will generate the NDR
    -- that part's out of your control.
     
    If they use SMTP to send the e-mail there's no way to know beforehand
    if a message exceeds your limts so the message is sent and your server
    sends a NDR -- if you haven't disabled sending NDRs to the Internet.
    Whether the sending system accepts your NDR is also something that's
    out of your control.
     
    Your SMTP protocol log and your applications log shold inform you of
    your server's action.
     
    ---
    Rich Matheisen
    MCSE+I, Exchange MVP
     

    --- Rich Matheisen MCSE+I, Exchange MVP
    • Marked as answer by emma.yoyo Thursday, March 17, 2011 4:24 AM
    Friday, March 11, 2011 1:02 AM
  • Hi shamrock,

    Any updates?


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
    Tuesday, March 15, 2011 8:45 AM