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Microsoft Exchange 2013 CU7 Distribution group problems

Posted on 2015-01-07
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Last Modified: 2015-01-14
We have a company on our hosted exchange with two recipients: user1@acme.com and user2@acme.com.
They have a distribution group with e-mailaddress post@acme.com, with both users as members. (External receiving is enabled)

When we send e-mail from any internal user on the hosted exchange to post@acme.com both users receive it. When we send from external users, only user1@amce.com receives it. Tried adding other users as members as well, but only user1 gets it. (But internally OK)

When I telnet to the edgeserver from external IP:
Ehlo test.com
Mail from:test@test.com
Sender OK
Rcpt to:post@acme.com
Recipient OK
DATA
Test
.
Queued mail for delivery….

And BOTH members of the groups receives it.

Even if I delete the dist group post@acme, user1@acme.com gets mail sent to post@acme.com from external users. I even tried to route external emails directly to the mailbox-server and not via edgesync, with the same results.
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Question by:daxa78
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Expert Comment

by:Simon Butler (Sembee)
ID: 40535403
The first question here is what does message tracking show?
If the email is received internally then that shows the group is working correctly, as it does if one user is receiving the email from external sources.
Message tracking will tell you if the email is being received by the second user - if it is, then something is happening to it on the client.

Simon.
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Expert Comment

by:Manoj Bojewar
ID: 40535596
Hi,

Check user mailbox-- mailbox feature- Message Delivery Restriction and unchecked accept message from " require that all senders are authenticated"

Thanks,
Manoj
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Expert Comment

by:Manoj Bojewar
ID: 40535598
Also check is there any transport rule blocking external message for this user.

Thanks,
Manoj
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Accepted Solution

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daxa78 earned 0 total points
ID: 40539962
It was the external spamfilter alias settings which caused this.
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Author Closing Comment

by:daxa78
ID: 40548544
Found it out
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