how to exclude email from notify?

Hi all!

when comes to email, macro initiator sends an e-mail that the treatment received by the system.
Conditions macro:

open in $"Open" and null(cpx.impact in $

E-mail information about the macro takes from

How can I exclude from sending one particular contact? in $ ~="username"  and (open in $"Open" and null(cpx.impact in $

It leads to the fact that the macro does not work.