List Imports: I want to see if they are already in marketo and their unsub status before uploading
I have a list of contacts and I want to see if these folks are already in marketo, and if they are, what their unsub status is.
I don't necessarily want to then have those contacts in the system, so I was just wondering if there is a way to manage that?
I suppose I can upload the list and then simply delete it after, but I am not sure if those contacts will still be in the database.
Any help on comparing lists to the database without uploading would be super helpful.