Email verification - where does it go?

Email verification - where does it go?

I've been using zoho for several years now, and still to this day, I don't get the email verification process.  I add a new user under my domain.  I create an [pop3 account on my server at poweredbyeclipse.com.  I enter all the credentials, do the test within zoho, and it all checks out.     Do the "send invite" and nothing.  What am I missing??  Drives me nuts!