Mail receving time

My email receiving time in em client is different from the system time and Gmail Time.
What could be the problem? 

Hello Mohammad, eM Client recognizes two time stamps displayed in the application interface, the time included in the message headers is the sent time of the message, time shown in the list of your messages is received time on your server, e.g. if the time seems to be showing incorrect data, make sure your server is using correct timezone settings.