Postfix header_checks too late
I have header_checks set on postfix but it is passing through the emails to dovecot for user validation before running header_checks.
(IMAP configuration)
This leaves the user list on the server open to probing.
(And is wasteful of resources)
Is there a way to trigger header_checks in postfix before it
tries to validate the end user?
If not can anyone suggest a way to do this before postfix?
TIA
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