troubleshooting Question

Remote Server returned '<mail.mycompany #5.7.1 smtp; 554 5.7.1 Error: need authentication from mail.client.com>'

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Senior IT System EngineerFlag for Australia asked on
* Public DNSDNSExchangeEmail Protocols
5 Comments2 Solutions841 ViewsLast Modified:
Hi People,

I've got this error message today even after registering the SPF record in my public DNS succesfully:

Remote Server returned '<mail.mycompany #5.7.1 smtp; 554 5.7.1 Error: need authentication from mail.client.com>'

What I'm trying to do is that I wanted to allow Client.com who is our outsourced marketing partner to send out promotion email on behalf of my users mailbox in mycompany.com, I'm using Exchange Server 2013 while the marketing company is on AWS all in cloud.

How to allow this to work ?
ASKER CERTIFIED SOLUTION
Dr. KlahnPrincipal Software Engineer

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