Kolab 3.1 postfix relay access denied

[Brady, Mike]

On 2014-03-18 07:56, Tomas Kucera wrote:
> Hi there,
> 
> I would like to ask for a help. I am not at all proficient in postfix.
> I got to a point where it seems like a lot of things work as expected.
> The current thing I am fighting is the following:
> 
> - CentOS 6.5
> - Kolab 3.1 (tried 3.2 but the multidomain setup just did not work)
> - multidomain setup
> - from Roundcube everything works fine
> - from external client (in my case Mail on Mac) when sending an email
> to a domain that is outside of the domains under control of Kolab /
> postfix I get Relay access denied.
> 
> I suppose that it is correct with the default setting but I just
> cannot figure out how to configure the postfix in a way that it will
> accept authenticated users and will allow them to send the emails
> everywhere.
> 
> I went through the documentation of postfix and tried some of the
> options for smtpd_xxx_restrictions, but did not get it to work.
> 
> So, please, please, help me!!!
> 
> A bonus would be to give some hints on potential security threats.
> 
> Thanks in advance!
> 
> Kind Regards,
> Tom.
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I am guessing that you are trying to send via Postfix's MTA (port 25 or 
465)?   Clients should be using Postfix's MSA (port 587) to send email.  
Postfix's smtpd_xxx_restrictions shouldn't need adjusting to do this.

Regards

Mike