[CentOS] large numbers of linux system user for postfix

Ben McGinnes ben at adversary.org
Mon Nov 8 11:42:39 UTC 2010

On 8/11/10 7:30 PM, ahmad riza h nst wrote:
> hello,
> i need to setup a mail server with postfix + dovecot + webmin +
> virtualmin + virtual user with linux system user. the virtual user
> may reach to thousands user from several hundreds virtual domains.

That shouldn't be a problem.  Postfix has had support for this for
well over a decade.

> what i concern is large numbers of linux system user which used in
> these setup, is it good or bad?

Virtual users with a Postfix/Dovecot installation does not equate to
real Linux/shell accounts.  If the only service being provided is
mail, then there's no reason to create real accounts.

> maybe somebody would share their experience about this setup ?
> any links would be good.
> postfix 2.6.7
> dovecot 2.0.6
> centos 5.x

Is there any particular reason you've chosen these versions?  That is,
are there specific functions which these versions provide that are not
in prior versions?

I ask because I'm running these versions in CentOS 5.x:


If the only concern is security updates, these are backported to the
current versions in CentOS.

> webmin + virtualmin

I've had no experience with either of these as I edit the config files
with a text editor.


Ben McGinnes  http://www.adversary.org/  Twitter: benmcginnes
    Systems Administrator, Writer, ICT Consultant
Encrypted email preferred - primary OpenPGP/GPG key: 0xA04AE313

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