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If you run the following command in the Exchange Management Shell, you will overcome the new 'Feature' of Exchange 2007<br />
<br />
get-distributiongroup | set-distributiongroup requiresenderauthenticatio<wbr />nenabled:$<wbr />false<br />
<br />
This will set all distribution groups to not require authentication to receive mails from external sources.
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If you run the following command in the Exchange Management Shell, you will overcome the new 'Feature' of Exchange 2007

get-distributiongroup | set-distributiongroup requiresenderauthenticationenabled:$false

This will set all distribution groups to not require authentication to receive mails from external sources.

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I seem to be banging my head on what should be a pretty straighforward situation.<br />
I am trying to create an email distribution group, I'll call it sales@mydomainname.com<br />
This is what I've done so far;<br />
<br />
1.) opened the exchange management console<br />
2.) expanded recepient configuration<br />
3.) Completed the new distribution wizard<br />
4.) added a few emails addresses to the group<br />
<br />
If I send an email from within our organization it works fine, however if someone outside<br />
our organization attempts to email this email address &quot;sales@mydomainname.com&quot;<br />
they get a bounce back;<br />
<br />
#550 5.7.1 RESOLVER.RST.AuthRequired;<wbr /> authentication required ##<br />
<br />
I'm running Microsoft Exchange Server 2007 .08.01.0359.002<br />
<br />
Please advise what I've done wrong,<br />
<br />
Thank You
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I seem to be banging my head on what should be a pretty straighforward situation.
I am trying to create an email distribution group, I'll call it sales@mydomainname.com
This is what I've done so far;

1.) opened the exchange management console
2.) expanded recepient configuration
3.) Completed the new distribution wizard
4.) added a few emails addresses to the group

If I send an email from within our organization it works fine, however if someone outside
our organization attempts to email this email address "sales@mydomainname.com"
they get a bounce back;

#550 5.7.1 RESOLVER.RST.AuthRequired; authentication required ##

I'm running Microsoft Exchange Server 2007 .08.01.0359.002

Please advise what I've done wrong,

Thank You

Problems With Email Distribution Group

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.