In the release notes for the next Chilkat version, you mention that IMG tags where being dropped in MHT if they contained images as encoded binary data. I recently attempted to insert html code having these types of tags into an email object using the your own example (https://www.example-code.com/csharp/mht_emailHtmlString.asp).
The end result was that IMG tags were dropped, so I initially thought that these types of tags where not supported, but know I guess it may be caused by the above-mentioned bug?
What I basically want is to convert images (whether embedded or links) into CID references if mht.UseCids is enabled. Will that work in the next version released?