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Distribution groups and Exchange 2010

Posted on 2016-09-10
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Last Modified: 2016-10-05
When a user sends an email to a distribution group. Does Exchange expand the DG before sending the email? If i looked at the header of such a DG would i see the expanded list of user addresses or just the DG email address?
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Question by:iamuser
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by:-MAS
-MAS earned 250 total points (awarded by participants)
ID: 41792925
Hi,
When you send an email to DG you will see only the DG name.
If you want to see the members you can expand and see the members.
Even after sending email you can expand DG to see the member in the group.

Thanks
MAS
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Todd Nelson earned 250 total points (awarded by participants)
ID: 41792955
MAS is correct.  

Does Exchange expand the DG before sending the email?

No.

If i looked at the header of such a DG would i see the expanded list of user addresses or just the DG email address?

The header info will only show the email address of the group(s) the message is sent to and not the email addresses of the members of the group(s).

Going back to your first question and mixing it with your second question...

If the user expands the group in the message they are sending it's a different story.  Then the header info will show all of the group members email addresses but not the group email address.

Hope that helps.
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Expert Comment

by:Akhater
ID: 41801306
Does Exchange expand the DG before sending the email?

Of course exchange expands the DG group or else how does it who to deliver the emails to ?

I am not sure about your question but once the transport service receives the email it will expand the DG and deliver the email(s) individually.

if the DG is expanded on the client side (before the email is sent) then the email will be sent to each user separately and that's a different story

Now if a server is specifically configured as expansion server for a delivery group the email will be routed to that server first and expanded there

in short email delivery cannot happen before the DG is expanded
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by:Akhater
ID: 41825905
I don't agree with the solution proposed, DG is expanded Before sending the email and Todd's comment states that it doesn't
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by:-MAS
ID: 41825908
Todd's comment not 100% correct as per my knowledge. i.e. The below statement is not correct.
"in short email delivery cannot happen before the DG is expanded "
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by:Todd Nelson
ID: 41829519
You should have enough information to answer your question.
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