Hello We are currently experiencing problems receiving external mails to distribution groups on one of our exchange servers. I have made sure that to uncheck "require that all senders are authenticated" but we are still receiving: #550 5.7.1 RESOLVER.RST.AuthRequired; authentication required ##rfc822;dl@domain.tld (original address removed) Our AD setup consist of a domain and a child domain. Exchange setup includes two exchange servers configured as hubs. They are physically in different parts of the world. If i create a distribution group at Exchange A in root domain, it works fine, but creating a distribution group at Exchange server B in child domain yields error message above. Internally it works. I have searched google dry without luck, any ideas?

Hi, I think there is something to uncheck in the distribution group / restriction I hope this will help you. Regards. Shafaquat Ali.M.C.I.T.P Exchange 2007/2010, M.C.I.T.P Windows Server 2008, M.C.T.S OCS Server 2007 R2, URL: http://blog.WhatDoUC.net Phone: +923008210320

As i described, i have already made sure to uncheck require authentication under message delivery restrictions. It did not solve the issue. Regards jesper

Hi, Than I will suggest you that use the message tracking and get the results that where the message is ending up also check the event viewer and post here if there is something wrong in event viewer. Regards. Shafaquat Ali.M.C.I.T.P Exchange 2007/2010, M.C.I.T.P Windows Server 2008, M.C.T.S OCS Server 2007 R2, URL: http://blog.WhatDoUC.net Phone: +923008210320

On Fri, 20 Aug 2010 13:08:12 +0000, Jesper K. _ wrote: > > >Hello > >We are currently experiencing problems receiving external mails to distribution groups on one of our exchange servers. I have made sure that to uncheck "require that all senders are authenticated" but we are still receiving: > >#550 5.7.1 RESOLVER.RST.AuthRequired; authentication required ##rfc822;dl@domain.tld (original address removed) > >Our AD setup consist of a domain and a child domain. Exchange setup includes two exchange servers configured as hubs. They are physically in different parts of the world. > >If i create a distribution group at Exchange A in root domain, it works fine, but creating a distribution group at Exchange server B in child domain yields error message above. Internally it works. > >I have searched google dry without luck, any ideas? Have you connected to a GC in BOTH domains (and to a GC in the AD sites within those domains where there's an Exchange server) and verified that the change has replicated? --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Hi Jesper, Please ren below cmdlet, and make a test: remove-adpermission "connectorname" -user "Nt Authority\Authenticated Users" -extendedrights: ms-exch-smtp-accept-authoritative-domain-sender Please also update your exchange for the latest version. Regards! Gavin