I’ve deleted some emails by mistake, so they landed in the trash bin. With the emails (5 emails, 3 incoming messages and 2 replies from me) in the trash bin, I found myself confronted with the issue of figuring out, how to undelete them.
There is no button or menu entry to “undelete / restore” them. So I hit the “Undo” button. This leads to the next bug, that 1 incoming message was put back into the inbox, 2 incoming messages landed in the sent folder, together with my 2 replies. Tha’t very confusing.
latest mailspring Version 1.9.1 (1.9.1) on macos 10.15.7
Yes, Mailspring will only copy emails within the same account. Rather annoying, I agree! To get around this, I resort to forwarding emails to my desired account. .
A problem that I believe happens (at least with gmail accounts) when you undo a delete is caused by how gmail handles the inbox. “Inbox” is a label for gmail. When you delete the email, it gets moved to the trash, and the label “Inbox” is deleted. When you undo the deletion, the email goes out of the trash, to “All mail”, but doesn’t recover the corresponding “Inbox” label. Then, the email would appear in “All mail” (maybe called “Archive” inside mailspring) but not in the inbox.
See "Undo Trash" does not return mail to Inbox