Email synch problems....not sending emails

A few weeks ago I started noticing that my Outlook progrma was getting stuck trying to "synchronize" my email folders....received emails just fine, but sending was a problem.  Restarting the W7 computer fiexted the issue for a few hours or even a day or two but the issue came back.

I ended up wiping the system drive,m doin ga fresh install of w10 and a fresh install of Office 2010 including Outlook 2010.

Same issues come back.  Shut down and restart the computer and Outlook quickly synchs all the folders and sends the emails that have backed up in my "sent" folder and all is fine for a few hours or a day or so.

I also access my mail via the outlook app on my android and no issues at all there.

Can anyone help me figure this issue out? I am using IMAP.