Hi Gualtiero,

This is natively supported by the commons-configuration library we use
for XML / properties parsing.

Try <prop>${env:MY_ENV_VARIABLE}</prop>

You can read:
https://commons.apache.org/proper/commons-configuration/userguide/howto_basicfeatures.html
(Variable Interpolation)

Best regards,

Benoit

On 02/09/2019 21:05, Gualtiero Testa wrote:
> Hi,
> 
> I would like to use environment variables to partially change the James
> configuration.
> 
> My use case it to create a Docker image and use environment variable to
> influence some parameters in the config XML files, depending on the
> execution environment.
> 
> For example I would like to change the "postmaster" address in the
> mailet-container.xml file.
> 
> Is there a way to do it?
> 
> Thanks,
> 
> Gualtiero
> 

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