Inline images not working in thunderbird?

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 <[e-mail]>
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

[philpagel]

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

[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.