The time to load a new message and read message take to long time, need 1 minute

I had 2 pc and install emclient v7
And im confused with the performance of the application
In PC A, emclient performance is fast…i need 5 seconds to open a message, to load message and to make a new message
But in PC B, emclient performance is very slow, it need 1 minute to do all the same jobs.

Is there any mininum requirement for the PC with emclient?
Or is there any additional condition or services need to be download to make PC B faster?
Help me
Thankyou :slight_smile: