Diagnostic-Code: X-Postfix; mail for ... loops back to myself Hi, I have a server with dedibox.fr and have installed the ispconfig 2.2.3_sarge package. I have set up a site: algarvegolfer.com I have used the "Gestion intégrale DNS" DNS servers offered by Dedibox and entered; A records algarvegolfer.com. IN A 18.104.22.168 www.algarvegolfer.com. IN A 22.214.171.124 MX records algarvegolfer.com. sd-XXXX.dedibox.fr. 10 (xxxx being the number of the dedibox) which all get acceptance from www.dnsreport.com I have changed the main.cf file from myhostname = localhost.localdomain to myhostname = sd-xxxx.dedibox.fr (xxxx being the number of the dedibox) I have tried ticking/un-ticking use maildir in ispconfig ...but can't send mails to the email address in use, they keep getting returned; Diagnostic-Code: X-Postfix; mail for sd-xxxx.dedibox.fr loops back to myself (xxxx being the number of the dedibox) I am slowly going nuts... Please save my weekend?