What bothers me most about my decision this summer to quit Thunderbird in favour of eM Client is that I did not do it earlier, because eM Client is so much better.
What bothers me a little bit, however, is a feature that I now miss in eM Client: When I delete an attachment from a message there is no trace of it afterwards. After the deletion, eM Client does not show me that the initial message had an attachment. Thunderbird shows a kind of placeholder in the attachments section of a message with a reference to the deleted attachment:
It would be great to have this as an optional feature as well in eM Client. Those who don’t like it could disable the option in the settings.