Hi,
I use postfix, amavisd and dovecot.

Is there a way to detect the email coming from my router and move them automatically to a specific folder?
Detect the subject of the email, the sender, the recipient, doesn't matter what we can detect,
the important things is that I can detect the email coming from router and move them to a folder.

What is the right way to do it?

You can pipe emails to a script and do what ever you want. You need to create an email where the router sends the email to.

Here is an example I Googled: http://blog.thecodingmachine.com/conten ... eives-mail

Dovecote Sieve filtering - http://wiki.dovecot.org/LDA/Sieve or http://wiki2.dovecot.org/Pigeonhole/ManageSieve for Dovecot 2.x.

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sleddog

I think that this is what I will choose, I will start studying this plugin, I will keep you posted.
The problem is, does CentOS 6.4 dovecot default package supports this plugin?

I don't think so...