I have K9 and Thunderbird mail clients for Android installed on my Motorola E series phone running Android 10. GMail and another institutional mail account (IMAP) have been configured on both mail clients. When I compose and send a mail from the institutional mail account from either mail clients, the sent mail is not copied to the sent folder (on the client nor the server), though the email gets sent to the recipients. Please help resolve this issue. Thank you for designing the wonderful mobile mail clients!