Gitlab CE better debug incoming email or reply to mail

Greetings,

how i can better debug incoming mail settings as it says only

sudo gitlab-rake gitlab:incoming_email:check
Checking Reply by email ...

IMAP server credentials are correct? ... no
  Try fixing it:
  Check that the information in config/gitlab.yml is correct
  For more information see:
  doc/incoming_email/README.md
  Please fix the error above and rerun the checks.
Init.d configured correctly? ... skipped (omnibus-gitlab has no init script)
MailRoom running? ... can't check because of previous errors

Checking Reply by email ... Finished

when i am connect to that mailbox from email client all works so my question is how i can force gitlab-ce to be more talktive