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MIME headers: Explicitly set type on multipart envelope#23

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arj03 merged 1 commit into
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fix-multipart-header
Mar 24, 2026
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MIME headers: Explicitly set type on multipart envelope#23
arj03 merged 1 commit into
masterfrom
fix-multipart-header

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@raphaelm

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We had trouble delivering invoices to Seeburger, one of Germany's major Peppol endpoints. After talking to them, they said their system is not parsing our messages because the type parameter is not set on the multipart header.

Indeed, the RFC says that this parameter must be present and must be set to the same value as the "root body part". This was news to me as well as it's usually not set on emails, but they're right and so hopefully this fixes it.

@arj03 arj03 merged commit 022b3b1 into master Mar 24, 2026
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@arj03 arj03 deleted the fix-multipart-header branch March 24, 2026 11:21
@arj03

arj03 commented Mar 24, 2026

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Thanks :)

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2 participants