Emails randomly get deleted

Thanks for the bug report. Could this be due to the fact that when a draft e-mail is deleted, the thread appears in the Trash, but does not show actual messages there. See also:

So this is exactly the case of what @tomastan displayed in the screenshot. This is also in line with what @mod323 originally posted (and confirmed here: Emails randomly get deleted · Issue #2205 · Foundry376/Mailspring · GitHub)