ok. I had a small mistake, because my HtmlViewer.qml file was a little bit older line 98 in you're patch file should be: Code: loadHtml(htmlBody, "file:///usr/share/jolla-email") But I think it is also working with the "webView." before. You can try to increase the with from 300 to 480 and see, if the text size got smaller.
loadHtml(htmlBody, "file:///usr/share/jolla-email")