No IMAP notification?

No IMAP notification?

So I'm using Operamail and have tried myopera email (IMAP) and it notifies me the second an email arrives.  I tried the same thing with Zoho and there was no notification until I manually checked it.  Did I not activate some setting?  I did enable IMAP in my Zoho settings.  I checked my email settings for both IMAP accounts (myopera and zoho) and they're identical.  My username and password work otherwise I wouldn't have gotten the message when I manually checked the server.