When using the PIA (Private Internet Access) utility to connect to the VPN I can exclude applications from using the VPN (split tunneling).

But I need to know which executable to block.

Blocking "kmail" doesn't work, all my gmail accounts then fail to connect or get blocked because of "suspicious activity".

Which exactly is the executable file for Kmail's sending mail and receiving mail processes?
Which files do I have to exclude from firewalls and VPN to have kmail using a direct connection via my ISP?

Thx!