What is 'syncronization'?

I added another email account recently to EMClient. When I retrieve mail now, EMClient goes through a process called “syncronization” for just that one account. What is this, and how do I turn this off? It takes approximately 20 to 30 seconds to go through this routine twice. Is this really necessary?

I’m afraid synchronization is really necessary. It’s a process that checks and performs any changes needed between your computer and the email server.
You don’t need to worry though, because while eM Client synchronizes with the server, everything should work as it should. It’s just checking for any changes between your database and the server.
I guess your new account just has more data to synchronize and that’s why it seems to take longer.

Best regards,