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Bouncing 5.1.0 - Unknown address error 530-'5.7.1 Client was not authenticated

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Hi All,

i want to ask my problem with my exchange environment, i have exchange 2010 environment with 2 CAS-HT with Windows load balance (WNLB) and 2 Mailbox, and i have DRC with 1 CAS-HT and 2 Mailbox, with ironport for SMTP gateway in every site, for now condition, all mailbox database is mounted in DRC site, but the smtp gateway using in HQ site, if i start the transport service in HQ, i cannot receive message from external domain or public domain, have bouncing with error “Remote Server returned '<[xx.xx.xx.xx] #5.0.0 smtp; 5.1.0 - Unknown address error 530-'5.7.1 Client was not authenticated' (delivery attempts: 0)>'the message was rejected by HT server in HQ, i was some research in internet, found the article that issue because anonymous user in default receive connector in uncheck position, but in my environment the anonymous user is has been checklist.

Anyone can help my problem?. I just want to know, why if i start transport services the message from external was rejected by IP HT Server.

Additional info :

[xx.xx.xx.xx] = is IP Hub Transport server.




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