Mailcow LDAP test fails immediately during setup

’s LDAP setup fails as soon as the test button is pressed. The problem does not appear to be caused by a issue or DNS.

The failure happens so quickly that the settings may be rejected before a real connection is made. There is little clear information available about this exact behavior, and the test button itself may also be part of the problem.

Key points

  • ’s LDAP test returns a connection failure immediately.
  • A issue and DNS have already been ruled out.
  • The fast failure may point to a settings check before a real connection happens.
  • The test button itself may be unreliable in this case.
  • Logs, port checks, and exact settings would be needed to diagnose it.
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