Re: X-sieve-redirected-from

The mail is forwarded, but no vacation response is sent, and the mail is not forwarded. I find the lda error like this:

_discarding_vacation_response_for_implicitly_delivered_message; _no_known_(envelope)_recipient_address_found_in_message_headers_ (recipient=bob.miller@hostname.domain.tld,_and_no_additional_ `:addresses'_are_specified)

Does the message have To: and From: headers? I recall getting the same (or similar) output when those headers were missing during my testing. Adding them fixed the issue.