I'm not an engineer or computer scientist but I thought I could get it but I'm already going a little crazy, I've tried all the solutions I've found on the internet and as always happens with linux, when I'm using opensuse without a GUI, half of the solutions don't work for me . I had the task of setting up a wiki on a local network that I also did so that everyone could log in and upload their files, for this we chose dokuwiki, in the end I managed to have the dokuwiki locally but the login does not work. Apparently all the solutions go through sendmail and this version of opensuse uses postfix, I have tried to replace one with another but the files that they tell me to modify are not the same. Then I tried to understand how a messaging server works to try to use postfix to make the login work. Nothing I've tried so far has worked, what's more, I'm getting to the point where I'm touching things in the system that I don't understand at all. I'm going to post this message in several forums, I hope someone knows the problem or knows what to do. Greetings.