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https://issues.apache.org/jira/browse/CAMEL-18517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17605852#comment-17605852
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Jeff commented on CAMEL-18517:
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Ok, if I can find the time I might do that. For anyone else that is interested,
the MailBinding class calls the `populateContentOnBodyPart` method which
converts the message body to a String. This delegates to the
MailConverters.java class which selects the first body part that has a
Content-Type starting with 'text' and converts that body part to a String. So
only the first 'text' body part is included, all others are lost.
> Camel mail multipart messages do not include all body parts
> -----------------------------------------------------------
>
> Key: CAMEL-18517
> URL: https://issues.apache.org/jira/browse/CAMEL-18517
> Project: Camel
> Issue Type: Improvement
> Components: camel-mail
> Affects Versions: 3.18.2
> Reporter: Jeff
> Priority: Minor
> Fix For: 3.x
>
>
> Camel mail does not include all MIME body parts in multipart messages. In the
> unit test linked below, the `htmlPart` body part is not contained in the body
> parts of the deserialized message. This test can easily be broken by simply
> changing the order that the MIME body parts are added to the multipart
> message in the `populateMimeMessageBody` method.
> [https://github.com/apache/camel/blob/main/components/camel-mail/src/test/java/org/apache/camel/component/mail/MimeMessageConsumeTest.java]
> Users expect to be able to send multipart emails which contain both plain
> text and html parts (multipart/alternative) so that the users email clients
> can display it appropriately. This is not possible with Camel, since only one
> of the two alternative body parts is deserialized.
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