Mail accepting incorrect password!

Mail accepting incorrect password!

Today was the second time that when logging into Zoho mail, I entered the wrong password and it still let me in. 

The first time, I was on auto-pilot and told myself that perhaps I had entered the right one after all. 

Today, however, I know for certain it was the wrong password for this account. 

This is a little disconcerting!

Has anyone else experienced this before? What can be done to ensure my account is safe from hackers? Or literally ANYONE having a punt at the password and getting in!

ZOHO - Please fix this issue!