Hi, Windoze 10, TB 91.4.1; Anti-virus excluded from scanning my profiles Testing with a brand new install and brand new profile, no add-ons installed. When sending a message, the "Sending Message..." dialog displays, the message is sent by the server, the address is added to the Collected Addresses book, but the message copy is not added to the sent folder. Same problem recurs with either office365 or gmail accounts (both set to POP with Oauth2), and regardless of whether message copy is saved in Sent folder for the account or Sent folder in Local Folders. Pressing cancel, which reactivates the compose window and then immediately pressing send again works as expected: message sends (a second time), address collected (if it was deleted from the address book), and copy is saved correctly to whatever sent folder is selected. Disabling "Place a copy in..." entirely removes the problem. Any ideas on how to resolve this, as I do want sent copies stored? Thanks