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