Like, for example, 'plugin' settings. Why I ask: Some of my sieve rules require the editheader plugin, which has to be activated and configured in either /etc/dovecot.conf or /etc/dovecot/conf.d/*.conf, for example 90-plugins.conf. (This is a Ubuntu 16.04 LTS & Apache based 'Perfect Server' setup.) As far as I can see, dovecot.conf can and will be overwritten by ISPConfig at times (the one time it did so lately was the ISPConfig update to 3.1.12). Any /etc/dovecot/conf.d/*.conf entry for the 'plugin' section, on the other hand, will be ignored, as there's already a 'plugin' section in dovecot.conf – which seems to have precedence over anything I try to configure in /etc/dovecot/conf.d/*.conf. Is there some way out of this catch-22 which I failed to see? Cheers, Etc P.S.: Sorry, I wanted to post this in ISPConfig - Installation/Configuration, not Linux - Installation/Configuration. Perhaps someone, if they, too, feel that's where it belongs, can move the posting?