I use a site called Wattpad which sends out notifications, a bit like Facebook, when someone has dropped a comment at you. For some reason Zoho mail is no longer receiving emails from the site. I've used an alternative web address for a few days, and the emails are sent and received happily, so the block seems to be at Zoho's end. 

I've not got any filters / blocks in place to prevent incoming emails from Wattpad. 

Help?

Thanks 

Gavin