hello, i have installed postfix dovecot vimbadmin roundcube with this tutorial https://rtcamp.com/tutorials/mail/server/postfix-dovecot-ubuntu/ but when i create a new domain in vimbadmin i get the mail with the settings but i cant log in with the name and password in roundcube.in mail from vimbadmin with configuration i get link to webmail webmail.example.com but this link isnt working, what i need to set up that it will working ?
Thank for you quickly answer