How can i change which IP IIS SMTP uses - basically primary ip of windows server 2012 R2

Hello. I added 3 ip to my network settings

They are set like below however windows server uses : 138.128.2.226 as a primary address

So IIS SMTP server also uses as 138.128.2.226 as primary however i want SMTP server to use

198.245.73.82 as primary

How can i do that ?

Ty