Errors sending email through RT: Duplicate header field

[Brady, Mike]

Steve 

I have encountered this before and it was Kolab adding the duplicate
sender header in my case.   

It is valid to have have zero or one sender header.  The default Kolab
configuration can produce invalid email by blindly always adding a
sender header (which is wrong) that its own default amavis configuration
(which is correct) rejects! 

Short answer, in /etc/kolab/kolab.conf set "sender_header" to false.  I
think that the kolabd service needs to be restarted to pick up the
change. 

Longer answer, see this thread
http://lists.kolab.org/pipermail/users/2014-March/016979.html 

Regards 

Mike 

On 2016-12-24 23:00, steve at sbsroc.com wrote:

> Thank you. I understand that kolab is generating the error report (amavisd-new to be exact). I'm actually trying to find what's generating the duplicate field. If it's not the fault of any kolab componemts, then perhaps there's a way to disable this check for now?
> 
> Thank you.
> Steve 
> 
> -------------------------
> 
> FROM: Aleksander Machniak <machniak at kolabsys.com>
> SENT: Dec 24, 2016 2:01 AM
> TO: users at lists.kolab.org
> SUBJECT: Re: Errors sending email through RT: Duplicate header field
> 
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