One Windows 10 user wrote: “I have noticed that when I respond to emails, the email I send disappears and cannot be found in sent items, outbox, bin, spam, or anywhere actually.
“The disappeared email cannot be found on gmail’s web interface either. It appears that it is automatically deleted and erased from the server.”
While others have said the missing e-mails have appeared in Spam or in other random folders on Gmail.
One of the affected users wrote: “I too have had this same problem. Fortunately for me I was able to find the sent emails in the Spam folder.
“There are multiple junk and spam folders and you may need to look carefully through them all.
“It appears that the recent May 28 update of the Mail and Calendar App (to Version 16005.12827.20200.0) has broken the Gmail Account integration.”