I set up the POP settings in my Outlook to download all of my emails (approx 1,300) from Zoho into Outlook.

While the emails were downloading my Outlook inadvertently shut down after downloading about 300 of my 1,300 emails.  I thought all of the emails had downloaded so I deleted the POP settings in Outlook.  When I realized not all of the emails had downloaded I set up the POP again to download, but no emails now download.  Any suggestions about what I mgiht be doing wrong?  Thanks!!