I’d swap the sambuca for 50/50 Galliano and vodka (to match the proof), and keep the Kahlua. When you’re riffing close enough to keep part of the name, you should keep part of the drink.
Galliano is herbal and sharp like anissettes, but just different because of the herbs used, including significant vanilla notes, which should go with the Kahlua
And with the exception of the first, commonplace for a long time.
I would also argue the first use is actually a process flaw if implemented. That’s a great way to make sure no one reads emails, and all kinds of information is lost