[Ext] set custom attachment headers

hello :),

i am developing an extension for a very specific use case for thunderbird.
When attaching a special type of file to an email i want to set customHeaders for that attachment (not the email).

I tried many things, but can not find a way to do it.

Is it even possible?

anybody? :smiley: #ping


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You’ll want to post this at https://thunderbird.topicbox.com/groups/addons

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