I put this in the problem category rather than an idea, since I believe it is a severe limitation of eM Client not to offer this essential feature.
I am afraid the data files and backup is going to soon grow oversize.
If eM Client won’t allow the deletion of attachments, I’ll have to revert to Outlook.
The option to delete attachments should be a feature every mail client (professional or not) should have.
Hoping this can get fixed.
It is in our todo list but I cannot tell you when exactly it will be implemented - I am sorry.