Properly configure smarthost on Ubuntu 16.04 and Exim4 using an external smtp (smtp2go)
sending and receiving mail works fine, but when sending mail to other users on the same domain or server I get mail delivery 550 error message. Can't send from user-1@[login to view URL] to firstname.lastname@example.org.
Hello, Hope you are good! I am a professional system admin and server engineer with 10 years experience. I can help you setup Exim4 smarthost setup. Best Regards Sudhan