On the Windows 10 platform, users who use the Mail and Calendar UWP app and bundle Gmail may now need to check the spam folder because the app quietly transfers messages sent by users to the folder and then cleans up as soon as the cleanup time arrives.
Several users on the Microsoft Answers forum responded to the question, with one saying
The Windows 10 Mail app connected to a Google account has always had this problem. I noticed that when I reply to an email, the e-mail I send disappears and can’t be found anywhere else that I’ve sent, sent out, spam, or anywhere else. I can’t find this vanishing message on the web version of Gmail, which seems to be automatically deleted and erased from the server.
Who knows the solution to this problem? I’ve posted my questions to the Gmail community and been told that this is a problem that Windows 10 users often report.
The problem appears to have started in May this year, when an element of the Gmail connection was broken after the user’s update, making it no longer possible for users to connect to their Gmail account.
The best solution, says Phil, MVP of Microsoft Answers, may be via POP or IMAP connection, wrote in the reply
I have done some further research on this problem.
The latest version of Windows Mail has broken Gmail’s settings. The method of automatically adding accounts using Google links provided by the Mail app is no longer valid.
The best solution is to remove your Gmail account from the Mail app and use the IMAP settings described in Gmail Help to manually re-add it through another account POP/IMAP.
Another thing you might do is change the security settings in Google to allow access to less secure applications. Google now thinks the Windows Mail app is a less secure app, so block it from doing some things.
While we wait for Microsoft to solve this problem, using Gmail only through the browser mail.google.com may be the most secure.
Another temporary workaround that Praful K found on Microsoft Feedback Hub is:
– Go to gmail.com and sign in
– Click “Settings” at the top right.
– Click on “Filtered and Blocked Addresses”
– Click “Create a new filter”
– Fill in your email address in the “From” section
– Click “Create filter”
– On the next page, select “Never send to spam”
– Click “Create filter”
The issue has been reported to Microsoft through the Feedback Center, but the company has yet to respond.