Hi @SaraD98. When an email is scheduled to multiple lists, we will note any duplicates and only send the email to them once.
"There's a multitude of ways to engage your audience through us using your social platforms - via ads, social post metrics, email links, and more! " - Will
"Target your most engaged contacts by creating a segment. Create a special offer or show your appreciation!" - Caitlin
"Greet new contacts with one or more automated Welcome Emails depending on their interests or your business goals." - Nick