Sorry to bring this back to life...
I was looking for a solution for a Global Sign, I notice the settings in main.config, however I'm wondering if there's any way to update the file contents from roundcube?
Maybe a plugin (couldn't find one so far).
Its nice to be able to point to files, but we have a specific scenario where a company needs to change the global signature often (maybe every month or so) and its not ideal for this to be done at server side every time... Is there any know pugin for this?