Hi all, I have a user that is connected to the organization exchange from home via POP3. When he try to send messages to external domain he get the respond - Server error: '550 5.7.1 Unable to relay' I searched the web and find that i need to go the smtp server and add my server to the relay restrictions but, that didn't help either. what can i do to solve this? Thanks for any help
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Server error: '550 5.7.1 Unable to relay'