Plesk NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table; gmail
I search for solution and the problem is that the server try to send email, but postfix and plesk configured the mail for external email in same server, and then don't work correctly, the solution is disable each mail internal server for external domain mail servers:
/usr/local/psa/bin/domain -u mydomain.com -mail_service false
About David Millán Escrivá
David completed his studies in Universidad Politecnica de Valencia in IT with a Master's degree in artificial intelligence, computer graphics, and pattern recognition, focusing on pattern recognition and Computer Vision. David has more than 15 years of experience in IT, with more than ten years of experience in Computer Vision, computer graphics, and pattern recognition, working on different projects and start-ups, applying his knowledge of Computer Vision, optical character recognition, and augmented reality. Co-Author of two OpenCV books and reviewer of few more.