um.. the uid and gid are used on a unix file systems to identify permission levels of access to files and directories. they allow an administrator to compartementalize access on a *nix box. they are closely tied with the applications.... chmod chown and chgrp.
Perhaps you should have read the rest of this thread before posting.
In the case of vpopmail, the fields are called pw_uid and pw_gid but they are used for other purposes. We had considered renaming pw_gid to pw_flags, but as Ken pointed out previously, there's too much code that refers to the field by its old name, pw_gid.
-- Tom Collins - [EMAIL PROTECTED] QmailAdmin: http://qmailadmin.sf.net/ Vpopmail: http://vpopmail.sf.net/ Info on the Sniffter hand-held Network Tester: http://sniffter.com/