The name on one of our emails doesnt change

The name on one of our emails doesnt change

Hi Zoho,

An email out of the four shows that we have shows the name Constantinos which i set when i created it. But i tried changing it to ReefandCo and it told me that it was saved it, but still shows Contstantinos. The problem is that i need to change the name so the customers can see the name of the company and not the name of an employee of the company.
I am attaching an image so you can see.

Merry Christmas
Thank you