help setting up zoho through k9

help setting up zoho through k9

hi,
it looks (to me) like everything is correct. when setting up, and in settings>fetching mail>incoming server, i put in my zoho username and password and get:

"Setup could not finish

Cannot connect to server.
(Unable to connect.)"

help please. is there a server problem? when i put in incorrect password i get same message.

TY!!!