Prevent zoho sending junk mail to iphone?

Prevent zoho sending junk mail to iphone?

Hi everyone, ZoHo does a decent job at blocking spam emails on the desktop site, but when on my phone ( iphone5s setting up zoho in the ios Mail app ) junk mail often gets sent to my phone.

Is there any thing I can do to help limit junk mail from being sent to my phone when its blocked on the desktop site?