Claus Ibsen created CAMEL-26018:
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Summary: camel-mail - the CamelMailAlternativeBody header is not
in the catalog
Key: CAMEL-26018
URL: https://issues.apache.org/jira/browse/CAMEL-26018
Project: Camel
Issue Type: Bug
Components: camel-mail
Affects Versions: 4.18.0, 4.22.0, 4.23.0
Reporter: Claus Ibsen
Fix For: 4.24.0
{{MailConstants.MAIL_ALTERNATIVE_BODY}} ({{CamelMailAlternativeBody}}, main
56aa5f4970a6, line 47) has no {{@Metadata}}, so the catalog does not list it
among the smtp headers, although the producer reads it for the alternative body
of an HTML mail when {{alternativeBodyHeader}} is not set. The YAML validator
of Camel CLI then rejects a correct route that sets it.
Checked with {{camel_validate_source}} of the Camel MCP server
(4.24.0-SNAPSHOT): a route with {{setHeader: name: CamelMailAlternativeBody}}
before {{to: smtp://localhost:3025?contentType=text/html}} gives "header
CamelMailAlternativeBody is not set by timer, smtp (the value would be null)".
*Proposed change*: add {{@Metadata(label = "producer", description = ...,
javaType = "String")}} to the constant.
_Claude Code on behalf of davsclaus_
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