Zoho mail on Windows Phone 8.1 cannot be displayed correctly

Zoho mail on Windows Phone 8.1 cannot be displayed correctly

(I have post this problem on the Microsoft Community, and the Forum Moderator asked me to contact Zoho Support for help: answers.microsoft.com/en-us/winphForum Moderatorone/forum/wp8-wpemail/emails-in-zoho-inbox-cannot-be-displayed-correctly/cda05684-de64-4b6d-a37b-b3acf707a721)

I am using Nokia Lumia 638 4G with Windows Phone 8.1. I have configured 2 email accounts in the email client: an Outlook account (live.cn) and a Zoho account (with my own domain name). The Outlook inbox works well, but the Zoho inbox cannot display email correctly.

An example is as follows. A plain text email with 8 lines (4 text lines and 4 blank lines between them) are sent to these 2 accounts.

It looks well in the Outlook inbox:


But it looks bad in the Zoho inbox (the first line is missed, and some source code are shown):


The source code of the email received by Outlook and Zoho can be downloaded from here:
https://onedrive.live.com/redir?resid=D9CC0F47B30EF987!200&authkey=!AN_xDNskekbFl6g&ithint=file%2c.zip

Meanwhile, the Zoho account works well with Android's email client and Claws-mail in Windows/Linux. The emails can be displayed correctly in these clients.

Please help me to resolve this problem.

Thanks a lot!