Let's see you explain he mounted a server with Ubuntu 8 and I prepared to work with ISPConfig, if everything works properly esque except the mail server, I send emails without problems but I do not get any from the street Only from the local network, and I think I am almost sure that it's DNS server in my ISP in the administration of domains, in the record I have set my ip, and that I smoothly redirected to the server but ip the MX is not and I tried to put the IP but also leaves no probe and putting the domain of my isp and was ineffective. So for the moment mails sent to [email protected] not come to any side. Os dejo a picture of my ISP where should I put a valid MX nose that it should be. Note: The port 25 and 110 open in the router. Greetings