I just install ISP config. For now everything is OK, but I have problems with mail login. I install RoundCube and SquirrelMail. I also try with Thunderbird (POP3) and I can not login. Always I get error: Login failed. I'm trying to login with this combinations: domain_user domain_user@domain email email@domain
You should use the same login as written in the column "User" in the Control Panel under User & Email. If you didn't change the default settings it is something like "web1_user".
No, it is not OK. I try that way but still I can not log in. Also, I need to login to mail, not to ISP config. web1_user can make more e-mails (as administrator for site probably he can make more mails for each department). 1 client can make more then 1 e-mail. How to login to this mails?