安装postfix后，roundcube登录失败

Question

试图通过Postfix和Dovecot获得Roundcube。我已经使用ssh命令创建了一个帐户，并且该帐户与Roundcube配合得很好。但是当我使用directadmin创建电子邮件帐户时，Roundcube说登录失败

鸽舍-n：

auth_debug = yes
auth_mechanisms = plain login
auth_verbose = yes
disable_plaintext_auth = no
first_valid_uid = 1000
mbox_write_locks = fcntl
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  driver = pam
}
protocols = imap pop3
service auth {
  unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0660
    user = postfix
  }
}
ssl = required
ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
ssl_key =  # hidden, use -P to show it
userdb {
  driver = passwd
}