Sorry, the solution was to open ports in the firewall, I do not administer the firewall and that's why I could not find the solution, but it was.

> Date: Wed, 5 Dec 2012 11:56:16 +0100
> From: me@junc.org
> To: users@lists.roundcube.net
> Subject: Re: [RCU] Roundcube server does not receive emails
>
> MeMo Cázares skrev den 04-12-2012 23:49:
> > well, I have found the solution, thanks.
>
> thanks for shareing problem without any solution
>
>
>
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