(#moqdvoq) @mckinley@twtxt.net Ta! KMail goes two steps further. The blue pane appears already while typing up the e-mail. When hitting Send, the Attach File… button in the message dialog is the default, minimizing chances of sending the mail without any attachments when just pressing Enter out of a habit. Yup, also experienced that a couple of times. :-)

And now I nearly missed adding the screenshot to this twt! Good thing I proofread it three times.