add Content-ID on attachments with low level smtp api

[Tzanou123]

Hello,

Is there any way to add and customize a Content-ID on attachments with low level smtp api ?

I need it to make a reference on an tag in my html

i actually use await builder.addFile(file, MediaSubtype.imageJpeg.mediaType);

Thanks

[robert-virkus]

I believe you can achieve your goal using this code:

final partBuilder = await builder.addFile(file, MediaSubtype.imageJpeg.mediaType);
partBuilder.addHeader('Content-Id', 'yourUniqueIdHere');

[Tzanou123]

Thanks dude !