Receiving e-mail is going very slow

Hello,

 

Since a few weeks the receiving of my e-mail is going very slow.

A simple text mail takes about 10 second to receive.

When I turn of NIS 2012 the receiving is going as normal.

 

Any way to fix this?

 

Greetings Nees

 

Specs:

Windows 7 Utilmate

Microsoft Office Outlook 2012