Restricting Email to Distribution List

I am running Exchange 2007 SP3 and need to restrict several DL so that only authorized users can send internal email to them.

I have created a Allowed-Senders DL, pupulated with allowed users to send. I then added this Allowed-Senders DL under "Mail Flow Settings" > " Message Delivery Restrictions"

If i tried to send a message from any regular user to a restricted DL, i get a "not authoirzed" error which is expected, but when i send an email from authorized users, I don't get the email nor an error.

Any thoughts? Is it that i must add users individually?
Who is Participating?
Manpreet SIngh KhatraConnect With a Mentor Solutions Architect, Project LeadCommented:
Yes for Internal users you have to add them as not to be able to send email to DL or only certain users can send to DL option

- Rancy
cheto06Author Commented:
Sorry Rancy, don't understand your comment very well. Are you saying the users have to be added as "ALLOWED" individually and not part of a DL. SO if i wanted to allowe to send to this wont work?  I'll have to add the members of estaff individually to "all"?
Simon Butler (Sembee)ConsultantCommented:
What kind of group did you create to control access? Was it a Distribution List or a mail Enabled Security Group? If the latter it needs to be the former.
Exchange doesn't convert the groups like it did in previous versions.

cheto06Author Commented:
I created a mail enabled universal distribution group (list)
PostmasterConnect With a Mentor Commented:
Use a Mail-Enabled Universal Security Group.
This will work as required.
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