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

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14 Comments on "FIX: Your message wasn’t delivered because of security policies in Exchange 2007"

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Happy
Guest

Thanks for the help!
You saved my time!

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Bill
Guest

Thanks!

sguttman
Guest

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

FT
Guest

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

Best,

FT

AAKASH JAIN
Guest

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

Mo
Guest

Thnx, this fixed my problem!

Nehemoth
Guest

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

Asif
Guest

Thanks a lot. This resolved my issue.

Justin
Guest

Thanks! This fixed my issue!

Jørgen Schmidt
Guest

Thanks, did the trick for me as well

Shadi
Guest

Thank you very much , also solved my problem

Davis Tamy
Guest

Thank you! This solved my problem!

Anonymous
Guest

Thanks a lot. This resolved my issue.

Thank you! This solved my problem!

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