[arch-general] problems installing package courier-authlib

Hey, I'm trying to install courier-authlib but after installation it says "error: command failed to execute correctly". It looks like it's installed but I also have issues trying to start authdaemond (chown: invalid user: 'courier:courier'). For any reason, it's expecting to have the courier user created and it's not. In the archwiki for postfix says nothing about creating that user. Regards. Any idea how to solve this? I'd appreciate your help! Matt. -- Live to fight another day.