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550 5.7.1 RESOLVER.RST.AuthRequired; authentication required

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Following error i get  when sending mail to SharePoint mail enabled library. It create contac  with  non ruted domain. Domain is not public. Let say that ending of domain is LOC. So it is not registered public domain…

 And it is A  contact, not Distribution group. Let put it , that that name  of the contact is : libaray@sharpoint.noreg.loc

I have setup Hybrid. All Exchange server s  are Exchange 2013 CU5.

To make it work, I have tried to send mail, to that library through share mailbox or transport rule…. Every time I send mail from outside organization or from mailbox, that is hosted in O365 I get following error :

libaray@sharpoint.noreg.loc<- I did use   email of shared mailbox , but that is returned

Your message can't be delivered because delivery to this address is restricted.

Diagnostic information for administrators:

Generating server: MBX01. noreg.loc

libaray@sharpoint.noreg.loc

Remote Server returned '550 5.7.1 RESOLVER.RST.AuthRequired; authentication required'

 

Massage tracking loge, gives me following error :

RunspaceId              : 9fd72017-0941-42f0-8625-b58b1c79b367

Timestamp               : 6/12/2014 3:30:03 PM

ClientIp                :

ClientHostname          :  MBX01

ServerIp                :

ServerHostname          :

SourceContext           :

ConnectorId             :

Source                  : ROUTING

EventId                 : FAIL

InternalMessageId       : 20190641259111

MessageId               : <0a5303866c7d4ceca0accfa7b78bf053@DB4PR01MB317.eurprd01.prod.exchangelabs.com>

Recipients              : {libaray@sharpoint.noreg.loc}

RecipientStatus         : {[{LRT=};{LED=550 5.7.1 RESOLVER.RST.AuthRequired; authentication required};{FQDN=};{IP=}]}

TotalBytes              : 10261

RecipientCount          : 1

RelatedRecipientAddress :

Reference               : {<91a7f625-60e6-4070-a834-b120d77d4c41@ MBX01.noreg.loc>}

MessageSubject          : test 1111

Sender                  : TestUser@publicdomain.com

ReturnPath              : TestUser@publicdomain.com

Directionality          : Incoming

TenantId                :

OriginalClientIp        :

MessageInfo             :

MessageLatency          :

MessageLatencyType      : None

EventData               : {[DeliveryPriority, Normal], [ExternalOrgIdNotSetReason, ]}

Additional Info   : 

Customer has internal domain whom  FQDN is noreg.loc. They have SharePoint  farm.  Farm has several  mail enabled document libraries.   Email enabled libraries has  FQDN  of sharepoint.noreg.loc.  They have  about 100 of those mail enabled libraries.  When library is crated it create contact, that islibrary1@sharepoint.noreg.loc,library2@sharepoint.noreg.loc , and so on...

Internal users can send  mail to that SharePoint library, works.  It has stopped working for those  whose  mailbox »user« is moved to  Office 365.

Now i have a problem. Because domain noreg.loc and sharepoint.noreg.loc is publically non-rutable domain, i do not wont to change  all emails addresses of library, I will  or I`m trying to do workaround.

First detailed  of contact : library1@sharepoint.noreg.loc

-         External SMTP : library1@sharepoint.noreg.loc

-         Alternate email : library1@customer.mail.onmicrosoft.com, library1@publicdomin.com

I can not use distribution group, and sync it to office 365. Because expansion of members in that distribution group, will happened  in Office 365 Exchange server. That will end up with error non existing domain forlsharepoint.noreg.loc.

 So I have tried with shared mailbox, that has setup forward to contact library1@sharepoint.noreg.loc.  I know that shared mailbox, has pickup mail, because, I have forget to set it, that every one can send to these recipient.  When that is setup,  mail is received, and transferred to  library1@sharepoint.noreg.loc , where it failed with error  authentication required.  Server that   send  error is Mailbox server “Exchange 2013”.

I will try to setup classical mailbox, with forward to contact, but that would use local licences, that I do not wont.

I need to setup  default receive connector on MBX server to allow  no-authenticated “server”  to relay, which I thing is security problem.

I do not understand why would sending mail to contact, required  authentication 


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