Syncing Microsoft MAIL with my Verizon email account – Windows 10 – Windows Essentials 2012

I was able to connect to my Verizon email account through Microsoft Mail after setting up the correct POP and SMTP Server names and concomitant port numbers.  The mail was imported very quickly.  I then tried to do the same with my "sent items" folder in Verizon, but keep getting the error message that it can't connect to the Verizon server....  Try Again Later....Error Code: 0x80072f78.  I went back to the "Account Settings", and I see that the MAIL app keeps changing the password for the server to something else.  I can't read it of course, but it's much larger in size than the password I'm using for my Verizon email.  Is this what the problem is, and why does the password keep changing back?  Don't know why it worked just for the inbox mail syncing.  I know that the Microsoft password can't be changed, or different in the MAIL app, but the passwords are the same in my Microsoft and Verizon email accounts.  So, I'm confused and don't have a clue what to do now.  By the way, I ran that Windows Essentials 2012 Repair utility through Control Panel/programs/programs and features/  Don't think it made any difference, although it seemed to run to completion successfully.  If anybody has any information as to what I'm doing wrong, I'd really appreciate their sharing.  Thanks!