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From: Rodman Frowert (rodmanshellport.com)
Date: Fri Jul 24 2009 - 10:50:27 CDT
I understand that anything for "mydomain" is looked up in /etc/passwd which
is a type of local recipitant table. But what if I want to feed that
"lookup system" another file in addition to the /etc/passwd file? I was
looking at the "local_recipitant_maps" parameter but haven't quite figured
out how to get it to be used.
Basically, I would like the default local lookup done IN ADDITION to another
file I specifiy. This way, I still get local lookups, but I can add users
to just the Postfix mail system and not to the actual Unix system. So
anything to mail that is "mydomain" will be looked up in both tables.
Does this make sense?
>You must set them up with a username/password *somewhere* so they can check
>their mail. With most IMAP/POP software, that means either creating system
>users or using a "virtual" back-end such as SQL or LDAP.
>The quick and dirty way is just create system users with the login shell
>set to /bin/false or whatever so they can't actually get shell access. For
>a small number of somewhat-trusted users, that's the easy way to go.
>Dovecot can use a "passwd-like" file (manually maintained file with
>contents similar to /etc/passwd) to make local users with no system
>privileges, you might want to read up on that.
> -- Noel Jones