HI, fiends.
Non Domainadmin account cannot relay via Exchange 2013 SMTP, any domain user account added to Domain admin security group can relay via SMTP Server.
Error message is as follows
Delivery to the following recipient failed permanently: noufal@web.net.xx Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the relay mail. web.net.xx by mail.web.net.xx. [213.130.xxx.xxx] the other server returned was: 550 5.7.1 Client does not have permissions to send as this sender.
Settings are attached
Please help
Noufal