A distribution group with "require all senders are authenticated" checked still receives external mail

a distribution group with "require all senders are authenticated" checked still receives external mail. this does not happen for any other DG i am aware of. this also happens from multiple external senders.
please assist.
thanks

Hi,
From your description, I would like to verify if the problematic Distribution Group is a member of other distribution groups that don't check "require all senders are authenticated".
What's more, please check if there is any difference between this problematic distribution group and other normal distribution groups.
Hope this can be helpful to you.
Best regards,
Amy Wang
TechNet Community Support

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Message Delivery Restrictions on Distribution Groups setting "Require that all senders are authenticated" on newly created groups

This is new behavior. I recently decommissioned my Exchange 2003 server. Could this have caused this new behavior? If so, how do I ensure "Require that all senders are authenticated" is unchecked during group creation?

I don't believe there is a way to change the default. You'll have to either go to the properties each time after you create the group and disable it. Or run the following powershell script after:
Set-DistributionGroup GROUPNAME -RequireSenderAuthenticationEnabled $False
Thanks, MikeV MCSE 2012

Require that all senders are authenticated no longer working

Hello,
I've already mentioned it in another thread, but maybe it's an update-issue in stead of server issue.
My problem: It seems (well, it doesn't work anymore, so it's an issue) that the option "Require that all senders are authenticated" on 'Distribution Group' not longer works. I really don't know why this happends and when it doesn't work anymore,
because it did work when creating the group (and the updates weren't available).
The situation (so maybe there's another option to find out what causes the problem):
Pineapp -> Exchange 2007 SP2 Rollup 4. The pineapp is being used before I installed updates of Exchange (and it did work with this setup), so in my opinion, this can't be the problem.
If someone could help me, or point me to a (new) direction so I can solve the problem with our Exchange server, that would be great :).

Update: When sending an email to the used distribution group, I get an bounce with 'authentication required'. When sending
an email to the user in the same group, the email is delivered in stead of bounced.
This is normal. You only enabled the "Require that all senders are authenticated" on 'Distribution Group', but the users in the same group do not have
"Require that all senders are authenticated" enabled. So the users outside of your domain still can send the mail to the users without authentication.
To batch enable the "Require that all senders are authenticated" for the users, you can use the following method:
1. Create a organizational Unit (OU), move the users to this OU.
2. Open EMS, type:
Get-mailbox -OrganizationalUnit |set-mailbox -requireSenderAuthenticationEnable:$true
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks

Can be set with one click that all senders are approved?

Can be set with one click that all senders are approved?
Example: folder inside POP3/IMAP have many folders. Can be approved email sender's or each sender needs to be added into UNwanted list?

Hi,
I'm not sure if I understand the request clearly, it seems you want to find an easy way to set all the mail senders in a folder as blocked senders or safe senders, correct?
I'm not sure which version of Outlook you are using, for Outlook 2013, there's no such quick method to do that by one click, you will need to use the Junk E-mail Options to add the senders to the Safe Senders or Blocked Senders list.
You can learn more information from Use Junk Email Filters to control which messages you see:
http://office.microsoft.com/en-us/outlook-help/use-junk-email-filters-to-control-which-messages-you-see-HA102749438.aspx
From the link above, please note if you have existing lists of safe names and addresses, you can move that information into Outlook. Click
Import from File and browse for the list file that you want. To create a file that uses your current list, click
Export to File and then specify where you want the new file saved.
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Hi,
Our environment, installed DirSync and no on-premise Exchange in environment. In Office 365 portal, if I need to change Exchange distribution Group, it require to change on-premise AD.
The question is if I want to update "ownership memeber" (not group memeber) and "membership approval" attribute, how can I do without EMC ?
thanks
Keith

This belongs in the Exchange forum, I will move it there.
Paul Bergson
MVP - Directory Services
MCITP: Enterprise Administrator
MCTS, MCT, MCSE, MCSA, Security, BS CSci
2012, 2008, Vista, 2003, 2000 (Early Achiever), NT4
Twitter @pbbergs http://blogs.dirteam.com/blogs/paulbergson
Please no e-mails, any questions should be posted in the NewsGroup.
This posting is provided AS IS with no warranties, and confers no rights.

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Hi All,
I have a
situation in a Exchange 2010 SP2 messaging environments where we want to manage two distribution groups through Outlook client and want to ensure that its membership is visible to none but the distribution group owners.
I have followed this article "http://blogs.technet.com/b/kamleshk/archive/2013/08/22/3478284.aspx" but in my case the owner can't see the membership.
The Outlook client version is 2007.
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Simone

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How about in OWA?
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If OWA not works neither, it still the permission issue. It need sometimes to sync the operation.
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Hello,
We're having problems to grant a mailcontact (external of our domain) with send as permission on a distribution group. We've tried already through ADUC's security tab...and the problem is that the mailcontact does not appear, so we can't add the send as permission.
Otherwise using the get-mailcontact cmdlet it appears as a mailcontact, and it's listed in the EMC list as well.
Also trying through powershell it seems that won't work with:
[PS] C:\Windows\system32>Add-ADPermission "DistributionGroup" -User "MailContact" -Extendedrights "Send As"
It says:
User or group "MailContact" wasn't found. Please make sure you've typed it correctly.
So I was wondering, how can I especify that it's not a User but a MailContact?
Many thanks in advance!

Hi,
As what Steve says, we can’t give send as permission to a MailContact. As a workaround, I think we can create a mail user with [email protected] account in AD. Then give full access permission with a domain mailbox(UserA) and set
Send As permission to this mail user for the distribution group:
1. Create a Mail User:
http://technet.microsoft.com/en-us/library/bb124381(v=exchg.150).aspx
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Add-ADPermission "DistributionGroup" -User "MailUser" -Extendedrights "Send As"
3. Assign Full access permission to the mail user to make sure there is a mailbox for this user:
Add-MailboxPermission “UserA” -User "MailUser" -AccessRights FullAccess
Then we can configure the mailbox(UserA) with MailUser account and send as the distribution group in Outlook client:
1. Open Control Panel > Mail > E-mail Accounts > New.
2. In the Auto Account Setup window, fill in the E-mail Account name(UserA) and E-mail Address([email protected]). Then click Next without type Password.
3. Click Finish to close the window.
4. Open Outlook and a Windows Security window would pop-up. Please use MailUser account information(User name: Domain\MailUser and Password) to log into this mailbox.
5. Click New Email > OPTIONS > From, then the From field is shown in the message.
6. Click From > Other E-mail Address, and select the DistributionGroup.
Then this external user can send as this distribution group.
Hope it helps.
Regards,
Winnie Liang
TechNet Community Support

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Neither of these error message look like they're from Exchange.
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I'm not going to try again; this message has been in the queue to long.
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--- Rich Matheisen MCSE&I, Exchange MVP

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Sorry, not a Firefox support issue as Firefox doesn't do email, it's a web browser.
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If your problem is with Mozilla Thunderbird, see this forum for support.
[http://www.mozillamessaging.com/en-US/support/] <br />
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The SAP documentation quoted in the previous post clearly states:
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All right. That's a good thing. Now create another new DDL using the Powershell cmdlet and the values you got from the "RecipientFilter" and "RecipientContainer" properties. Then verify that you get the same results as you do when you ran this on the one
you created with the GUI:
Get-DynamicDistributionGroup
'NewGroup' | fl Name,RecipientContainer,RecipientFilter,LdapRecipientFilter
and
$g=Get-DynamicDistributionGroup NewGroup
(Get-Recipient
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-OrganizationalUnit $g.RecientContainer).count
If you do, then run a Get-DynamicDistributionGroup GROUPNAME | Set-Dynamic -RecipientFilter
{(RecipientType -eq 'UserMailbox') -and (MemberOfGroup -ne "CN=1ExcludeDynamic,OU=ExchangeGroups,DC=xyz,DC=com")}
Then see if it works as expected. If it doesn't try this:
Get-DynamicDistributionGroup GROUPNAME | Set-Dynamic -RecipientFilter {(RecipientType -eq 'UserMailbox') -and -not (MemberOfGroup -eq "CN=1ExcludeDynamic,OU=ExchangeGroups,DC=xyz,DC=com")}
--- Rich Matheisen MCSE&I, Exchange MVP

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Hi,
I have created several emails linked to distribution groups in Exchange 2007. When i email to these groups from an email hosted on the server the email goes through just fine. When I try to send to these emails from an external email address (one from hotmail or yahoo) the email is never received and I never get a message back saying anything went wrong. I am able to receive email to all normal user accounts. I know it was possible in Exchange 2003 to have group emails receive email from outside sources, as I used several group emails as logins at various forums, and received updates from them.
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Hello Scotty,
When you create any distribution list with Exchange Management Console - EMC or Exchange management Shell - EMS in 2007 by default Sender Authentication is Enabled to prevent unwanted messages from spam and from outside domain, this is by default in design...
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A distribution group with "require all senders are authenticated" checked still receives external mail

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