I checked the username in settings of evolution, it's the same like you wrote here. But this step is a little bit hard to understand:
Check you email server settings if it requires the password to be supplied as encrypted.
I found mail logs in this directory: /var/log/mail.log and after login fail it says:
Code:
May 17 12:42:32 imone dovecot: pop3-login: Login: user=<karolis>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured
May 17 12:42:32 imone dovecot: POP3(karolis): mail_location not set and autodetection failed: Mail storage autodetection failed with home=/home/karolis
May 17 12:42:32 imone dovecot: POP3(karolis): Fatal: Namespace initialization failed
maybe it will help you to help me, thanks!