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  • Status: Solved
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Exchange 2013 relay Failure / not authorized to use the server

Have a windows service app which sends emails but and am getting the below errors;

Event Application Log:
The account '<Domain>\Administrator' provided valid credentials, but is not authorized to use the server; failing authentication.

WS Log:
Mailbox unavailable. The server response was: 5.7.1 Unable to relay

I have a receive connection set up with TLS and Exchange Users
0
crundle32
Asked:
crundle32
  • 3
1 Solution
 
James HIT DirectorCommented:
Can you try putting 'Anonymous Users' in the permissions group and try again.
Did you also only specify your internal IP range in the receive connector?
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crundle32Author Commented:
I have also tried TLS with and without the mutual Auth TLS with the anonymous. Getting same errors.
Scoping:  
IP Address: 10.0.5.2-10.0.5.200
Binding:
(All Available IPv4) 25

Should add this windows service is running on the Exchange service not a different machine.
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crundle32Author Commented:
For others;
changed to port 2525, and set app to UseDefaultCredentials = True
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crundle32Author Commented:
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