Hi guys! I would like to try Facebook Custom Audiences. In order to create one, I was wondering if Facebook emails can be used for that purpose, i.e. something like [email protected]. I thought about this solution because I do not have email lists and from what I understood, Facebook ids can be used only if they were gathered through a Facebook application (there is a field to provide its id during creation process). Could you please clarify the use of Facebook emails for that use case?