Emails content missing

Emails content missing

We have been having problems with users not getting the full email on their handheld device. They get the email and only the first few lines are showing. 

I have sent emails from and to the account and they are viewable in the webmail portal but only a bit on the handheld. I have tested with other email accounts (exchange) on the same devices and they get the whole email. Its only emails that are on zoho email 

Can you help?