Cannot setup email accounts on my Samsung phone.

A couple of days ago, I noticed my email was not syncing with my Samsung Phone or my Samsung Tablet.  However, it is syncing with Outlook on my laptop.  I’m also able to log in online with no issues.  Today, I tried deleting my two Comcast email accounts from both my tablet and phone and re-added them.  It worked just fine with my tablet and my emails are up to date now, but I was unable to re-add my accounts on my phone.  I keep getting the error message.  “Couldn’t connect to your account.  Check your account and server information, then try again.  I’m using IMAP and the same settings as used by my tablet, which is working fine now.  I’ve tried clearing the cache and data and rebooted the phone several times.  Nothing works.