[jira] [Commented] (EMAIL-171) buildMimeMessage() unconditionally encodes and folds header values

["Vít Rozkovec (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/EMAIL-171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16410100#comment-16410100 ] 

Vít Rozkovec commented on EMAIL-171:
------------------------------------

Is this related to EMAIL-138?

> buildMimeMessage() unconditionally encodes and folds header values
> ------------------------------------------------------------------
>
>                 Key: EMAIL-171
>                 URL: https://issues.apache.org/jira/browse/EMAIL-171
>             Project: Commons Email
>          Issue Type: Bug
>            Reporter: Sebb
>            Priority: Major
>
> The buildMimeMessage() method unconditionally calls MimeUtility#fold and MimeUtility#encodeText for all entries in the headers Map.
> However the encodeText method is only suitable for "unstructured" RFC 822 headers, i.e. those which consist of arbitrary text.
> If the headers Map contains any keys that have structured values, and the value contains any non-ASCII characters, the generated header may be corrupted.
> If the user adds a structured header to the Map, they need to ensure that the value is already ASCII-encoded using the appropriate strategy for the field.
> This needs to be documented.



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