Mail sent from Zoho to Gmail not received for an hour

Mail sent from Zoho to Gmail not received for an hour

I had asked a friend of mine who is also hosting mails on Zoho server to send me a mail on my Gmail ID, I received it after an hour of sending. Similarly I have sent a mail from my email hosted on Zoho (gvalani.net) at 4:02 PM and I have not received it till 4:17 PM.

Is your mail server having problems

Please help

Sunil Gvalani