The templates for the signature are fine. It’s a bit cumbersome, but you don’t have to do that all the time.
If I send a message with an image as an inline attachment, it cannot be displayed in Thunderbird, for example. Only when I open the attachment with e.g. irfanview, I see the picture. Irfanview then warns that this is a png file with an incorrect file extension, for example. On the iPhone there is no way to display the image. On Android it is an attachment and can be opened awkwardly. In Outlook it works unpredictably, so sometimes it works, sometimes not.
Gmail on my smartphone is the only program that displays the embedded images without complaint.
If I forward a message with inline-image from gmail to my Kopano account, which I sent with Kopano to gmail before, it will also not be displayed. Then “secondary_object.bin” and “noname” are to be seen as attachments. Only a “broken image” symbol appears instead of the image
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