Hello,

I would like to report a rendering issue in (automated) emails sent from roundtable.world.

Emails from senders such as noreply-44-de@roundtable.world are displayed incorrectly in Thunderbird Mobile. Specifically, the message preview (and sometimes the message body) shows raw HTML source instead of readable text. The same emails render correctly in Thunderbird Desktop, Gmail, and Apple Mail

After inspecting the raw message source, the issue appears to be caused by an incorrect MIME structure:

The email is sent as multipart/alternative, but the text/plain part is malformed. It is declared as:

Content-Type: text/plain; charset=iso-8859-1

However, it actually contains the full HTML source of the email, starting with:

A proper text/html part follows, containing the same HTML content again.

Expected behavior: The text/plain part should contain a proper plain-text version of the message (without HTML tags).

Current behavior: The text/plain part contains HTML source code.

Recommended fix: Please adjust the email generation so that:

The text/plain part contains actual plain text The text/html part contains the HTML version I can provide a full raw message sample if needed.

YiT,