MTA configuration (qmail) &fmldevel; assumes that qmail configurations is always based on /var/qmail/control/virtualdomains regardless of the default domain or not. The template of /var/qmail/control/virtualdomains is created at /var/spool/ml/etc/qmail by makefml. The default domain (example: fml.org) It is good to prepare "ml.fml.org" domain for ml specific. At /var/qmail/control/virtualdomains specify the following rule ml.fml.org:fml-fml.org . "makefml newml" can set up ~/.qmail-* automatically. See the section on "makefml newml and qmail" on how "makefml newml" creates ~/.qmail-* files. virtual domain (example: nuinui.net) For "nuinui.net" virtual domain, not the default one, specify nuinui.net:fml-nuinui.net at /var/qmail/control/virtualdomains. It is same as in default domain case.