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I want to install postfix and configure it for virtual domains on centos. Recently, I configured postfix and it works fine with system users files /etc/passwd, /etc/shadow.

but I want to make dovecot and postfix authentication not on system users or mysql databases. I would authenticate users with some files same as /etc/passwd as proftpd authenticate.

is there a chance?

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Please clarify: You don't want Dovecot/Postfix authenticate against system files, but you want use /etc/passwd for authentication? This is a system file. Or do you want to use a file similar to /etc/passwd, possibly the same file you use for FTP authentication? – SvenW Dec 27 '11 at 12:27
for more clarify, it means i want use a file for authentication, but don't use /etc/passwd file. or i don't want every body that has a mail on this system can login on the server (i know /sbin/nologin). – Ali Azimi Dec 27 '11 at 12:59
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So then just do it.

Postfix does not do authentication at all. It delegates to the auth mechanism which can be cyrus-sasl or dovecot: http://www.postfix.org/SASL_README.html#server_dovecot_comm

As you already use Dovecot, you should use it for authentication. The solution you want is extensively described in the manual: http://wiki2.dovecot.org/AuthDatabase/PasswdFile

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exactly! thank you;) – Ali Azimi Dec 27 '11 at 23:14
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