Hi all, can you guys please help me with this. I've followed the Perfect Server: Debian 8 with NginX, my debian is x64. The problem I have is when I try to send an email from a domain but his MX points to another server. Everything is working fine but this. The mail server is complete with Amavis, Clamav and SpamAssassin and I get a 10/10 score when send emails outbound, and I do receive mails from outside without any problems too. I tested what people suggest on other forums and deleted the hostname domain from "mydestination" parameter but didn't work. The only way that works is by removing this line: virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf If I remove the line above all emails will do a MX lookup and delivery as expected but I can't receive any email from outside, example: If I change the MX record pointing to the new server and send an email from my personal Gmail to the domain the email will not be delivery. Is there any tip or trick to fix this? Thank you any help.