gmail search/filter help - find email chains with messages from outside my organization

[ElFenix]

we don't have a 'tell me how to internet' board so this goes here

lets say i have a hosted gmail for elfenixnotarestaurant.com. i need to search the email accounts in that domain for a certain keyword. i also don't want to find purely internal email, so i don't want a search that returns a result with that's between only elfenix@elfenixnotarestaurant.com and staff@elfenixnotarestaurant.com. but if an email is sent to pome@mayne.com or fungal.culture@zinfamousdoesntlikelikes.com, i want that result. i don't know what outside email accounts have been contacted so just searching for those doesn't work.

any help?

 

[IronWing]

in:sent -toelfenixnotarestaurant.com) keyword

Notice the minus sign in front of to()

Edit: notice the frickin' smiley replacement.

-to:(elfenixnotarestaurant.com) keyword

will get you sent mails

-from:(elfenixnotarestaurant.com) keyword

will get you received mails