FMS/Exchange/Windows 10 Relay error 550 5.7.1

[profit10]

Hi,

 

I'm not sure where the issue with this lies exactly but the only software we receive this error in is FMS when someone tries to send an external email. It works fine in Windows 7 ever since I set up the Receive Connector in exchange correctly however the problem occurs in Windows 10. We are using Exchange 2010 if that helps.

 

Any ideas?

 

Thanks

[ItsOggy]

Any IP restrictions on the receive connector?

[profit10]

I removed it and created it again exactly the same and it is working! Very strange, thanks.