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#5.5.0 smtp;550 Administrative prohibition - envelope blocked

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Dale Galvin

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Dec 10, 2009, 7:05:01 AM12/10/09
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Hi all.

I'm probably missing something completley obvious but this is giving me a
bit of a head ache.

Platform: Windows Server 2003 SP2 / Exchange 2003 SP2 / Mimecast SaaS Email
Filter

We have an Active directory distribution group setup with an Exchange
Contact as a member. The group has an externally available email address.

Now when an email is sent to this address it feeds through our filter
without problem but Exchange issues a NDR as in the subject of this post.

If I email the contact directly byt selecting it from the GAL the email
sends without issue.

If I open the NDR and select resend the message sends without issue.

Is there something I'm missing?

Thanks in advance

Sharky01

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Dec 24, 2009, 1:09:01 AM12/24/09
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Hi there,

Do you have any external contacts in the distribution group? These need to
be allowed as permitted forwarders on the Mimecast Filter.

SteveXP

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Jan 6, 2010, 9:54:01 AM1/6/10
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In Mimecast, go to User Directory > Profile Groups > Relay
Add the email address in there.
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