Inline images not working in thunderbird?

[philpagel]

I am trying to use an inline image as described in the readme.md and at first sight it is working, but not consistently for different mail readers.

Here is my template:

To: {{email}}
Subject: Hi
From: Foo Bar <foo.bar@xxx.com>
Attachment: logo.png
Content-Type: text/markdown

{{salutation}} {{title}} {{lastname}},

Some email text.

Best regards
     me

-- 
Me 
jobtitle

![Company logo](logo.png)

I sent this to myself (different accounts), first and opened it in different mail readers. To my surprise they differ with respect to the result:

• gmail web: image is shown
• thunderbird: Image is not shown inline
• Webmail (t-online): image is shown inline

Of course, this seems to indicate a problem at the end of the mail reader but then Thunderbird is pretty widespread so I was wondering if there is something I am getting wrong or if this could even be a bug. Of course, I checked and "Display attachments inline" is checked in thunderbird.

Any hints or insights are highly welcome.

Thanks Phil

[awdeorio]

Thanks for taking the time to report, Phil. I wonder if an HTML change suggested by this SO post would fix the issue? The post suggests using Content Type multipart/related instead of multipart/mixed.

Tagging @seshrs for his opinion.

[philpagel]

Thanks for the link! I'll play with that and report on the result.

[philpagel]

Sorry for the delay, I was pretty busy during the week. But today I found some time to further play with this.
I went and edited Thunderbirds mbox file changing multipart/mixed to multipart/related for the message in question and, lo an behold, the inline image is now correctly displayed in thunderbird.

[awdeorio]

Thanks @philpagel this is really helpful. Let me know if you feel up to trying a fix. I think it might be a one-line change.

[philpagel]

Sounds easy enough – I'll fork look into it and get back with a PR.