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FIX: Your message wasn’t delivered because of security policies in Exchange 2007



When you’re trying to send an email to a distribution group, the following error may be returned:

Delivery has failed to these recipients or distribution lists

Your message wasn’t delivered because of security policies in Exchange 2007. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator.

In most cases, this error appears because you’re trying to email from outside your company to an internal distribution. By default, only authenticated users are allowed to email to a distiribution group.

To allow emailing to the distribution group from outside your organization, follow these steps:

  1. Open the Exchange Management Console
  2. Expand Recipient Configuration
  3. Click Distribution Group
  4. Double click the distribution group
  5. Select the Mail Flow Settings Tab
  6. Double click Message Delivery Restrictions
  7. Uncheck “Require that all senders are authenticated
  8. Click OK

Settings are immediately effective ,so it should work right away.

To create a more secure environment, it’s better to define email addresses where from mail may be sent to the distribution group. This allows you to prevent spamming from unknown email senders. To only allow email from known email senders (outside your organization), you first need to create a mail contact. To create a mail contact, go to Exchange Management Console -> Recipient Configuration -> Mail Contact , right mouse click and choose New Mail Contact.

After you have created the mail contact, do the following:

  1. Open the Exchange Management Console
  2. Expand Recipient Configuration
  3. Click Distribution Group
  4. Double click the distribution group
  5. Select the Mail Flow Settings Tab
  6. Double click Message Delivery Restrictions
  7. Select “Only senders in the following list:
  8. Click Add…
  9. Select the mail contact and click OK
  10. Click OK

14 Comments

  1. Happy says:

    Thanks for the help!
    You saved my time!

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  3. Bill says:

    Thanks!

  4. sguttman says:

    I looked into this already and this was unchecked. this did not help at all.

  5. FT says:

    Thanks a lot for sharing your knowledge! This is a great post
    Keep up the good work

    Best,

    FT

  6. AAKASH JAIN says:

    Problem is preset, due to SPF or one another record settings. can any body tell me how can I configure these records.

    Thanks in advance.

    regards

    AAKASH JAIN
    skype–jain_it

  7. Mo says:

    Thnx, this fixed my problem!

  8. Nehemoth says:

    I’m having this problem but I don’t have Exchange 2007, I have Exchange 2003 SP2

  9. Asif says:

    Thanks a lot. This resolved my issue.

  10. Justin says:

    Thanks! This fixed my issue!

  11. Jørgen Schmidt says:

    Thanks, did the trick for me as well

  12. Shadi says:

    Thank you very much , also solved my problem

  13. Davis Tamy says:

    Thank you! This solved my problem!

    1. Anonymous says:

      Thanks a lot. This resolved my issue.

      Thank you! This solved my problem!

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