Email desktop notification don't work

Email desktop notification don't work

Hello,

I wanted to be warned when I receive an email on my Zoho email adress... So I activated it... I did anything I had to do for it to work, and the I wrote two emails to myself, on another zoho email adress of mine... And I haven't been warned at all.. Not any desktop popup... Just one sound such many and long minutes after I received my own email...

Does anybody know how to fix that issue, please?

Thank you very much