I have several accounts linked to the Windows 10 mail app (the one that has the blue mail icon in Windows 10).
About two weeks ago my sent items stopped being saved but only for the gmail accounts, my other email accounts are still working fine.
If I send from another device the emails are saved and appear in the sent box for that account in the Windows 10 mail app. It is only items sent from the the Windows 10 mail app itself that are not saved.
How do I get the sent items to save for gmail accounts in the Windows 10 mail app?