Hi all, All my client's email route to my administrative account whenever I use catchall or not !!! I have searched the related forums but cannot get help. After I have changed myhostname from AAA.com to BBB.com in main.cf, I restart everything even reboot the server, abnormal thing happened. All virtual domain user's incoming email routed to the administrative account of BBB.com, whenever I check or uncheck the catchall box. The outgoing email from virtual domains are sent out correctly with their virtual domain name. Forgive my less knowledge in mailserver and ispconfig setting, I wonder the myhostname must use mail.BBB.com and cannot use the same hostname of BBB.com ?