Hi guys,
After trying many possible fixes for this error, I'm back to square one.
We're currently running Exchange 2013 on Windows Server 2012 R2. Our accounts department are getting '550.5.7.1 unable to relay' when sending external email payslips out of MYOB. We have no problems sending/receiving internal or external emails in general. The error occurs only when sending emails out of MYOB. MYOB has no specific email services it needs to configure to run, it should be a straight forward process.
All the threads I've read regarding this error revolve around creating a new receive connector in Exchange for the Application (MYOB)
I've followed this thread to a tee -http://exchangeserverpro.com/exchange-2013-configure-smtp-relay-connector/. Create new Receive connecter->Set everything up, IP, checked Anonymous, run shell script, run TELNET, get no 550.5.7.1 unable to relay error, but even after all that, still 550.5.7.1 unable to relay error appears when sending external emails out of MYOB.
Any help appreciated.
Cheers.
