So Protonmail recently released the Linux version of their Bridge app for Thunderbird.
I tried it and it seems that adding the In-Reply-To line isn't enough. I added that line using the [header-tools-lite extension](https://addons.thunderbird.net/en-US/thunderbird/addon/header-tools-lite/) and after sending the email that line was gone. Do I have to add other lines? -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to hugin-ptx+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/axTkKIfN13gDOEXepzLV07bwJczYl8lWqi_tCSNXLdGgEylVASJVZkIxYgZ3zHbOFojd_-OJlq2J3GEEZAS0e_Xp6XQgvW9d3ddul7MOG6M%3D%40protonmail.com.
