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kumomta/docs/reference/header/message_id.md
2025-10-07 07:38:10 +01:00

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message_id

local message_id = header.message_id

{{since('2025.10.06-5ec871ab')}}

Reading the message_id field will attempt to interpret the contents of the header as a Message-Id header.

If the header value is not compatible with this representation, a lua error will be raised.