Michele's wiki/blog

First, the sendmail.mc configuration file should point to the virtual user database; to do this, include a line

FEATURE(‘virtusertable’,‘hash /etc/mail/virtusertable.db’)dnl

The virtual user database itself should be contained, in clear, in the file /etc/mail/virtusertable; each line should contain a virtual address (user@site.com) and the translated address. The .db file is created with makemap hash virtusertable.db < virtusertable, but running make in the /etc/mail directory should be enough.

Second, the sendmail.mc should contain the line

FEATURE(use_cw_file)dnl

and the /etc/mail/local-host-names file should contain all the domains for which we are accepting mail.

Now run make in /etc/mail to transfer your sendmail.mc changes to the sendmail.cf configuration file, reload sendmail, and have fun.