But I'm currently administrating the ISPConfig and try to understand how things works. I've manage to add an user and send / receive emails through the webmail. I've tried to experiment with configuring my local email client to be able to use the mailserver, but with no success. What login credencials should I use? Same as for the webmail login? What setting should I use in the Authentication type? What name for the mailserver should I use (the "mail.clientdomian.com" or "mail.ispconfigserver.com")?
I'm just an beginner trying to learn about ISPConfig, DNS and mailservers at the same time.