Code: Centos 7.3 ISPconfig 3.1.2 I was trying to add Relay Host ( sendgrid ), saved and not worked. Then all mail config under (system->server config->mail) disappeared... How do I recover that info? Code: Maildir Path is empty. Invalid maildir path. Homedir Path is empty. Invalid homedir path. Mailuser uid must be >= 2000 Mailuser gid must be >= 2000 Mailuser Name is empty. Invalid mailuser name. Mailuser Group is empty. Invalid mailuser group name. Uid-mapping cannot be changed if there are already mail users. Thanks