My desktop computer developed Internet connection problems that resulted in my performing a total system rebuild - wipe the drive, reinstall Win 7 Home Premium from DVD media, reinstall programs like Office 2013 (365). I used a program called BackupOutlook to save a copy of the Outlook files on a USB and then used that program on the "new" setup to restore. For the Gmail using IMAP, I choose to create a new Data File, and all recent e-mails are there in the Inbox or in another folder in the list. I used the server settings I had used previously, and test messages were sent and received normally.
But what I discovered thereafter was that messages I created and sent went into the Outbox and remained there. I have re-checked server settings, run a Scanpst.exe on the Data Files I believe might be relevant, checked Add-ins (and found two already disabled by the system), and run Outlook in Safe Mode. Nothing has resolved the problem. I did a similar re-do on another desktop a few months ago and did not encounter this problem. This used to happen now and then before I rebuilt that other computer, but a shutdown and restart of Outlook would resolve the matter. That problem disappeared after that rebuild.
Thanks to all for insight and advice for a fix.
PS If I activate Send/Receive All Folders, I get this popup: "An object could not be found."
Edited by walter37, 04 September 2015 - 10:19 AM.