My campaign has already sent its email.

My campaign is synced to Zoho CRM leads.

I imported about 700 new CRM leads

ZOHO Campaigns synced those new leads into my campaign's contact list.

I need to resend the campaign to only the campaign list contacts that are new.

There doesn't seem to be an option for that.

I must be missing something. By the very nature of sync, new CRM leads are going to be added to the synced Zoho Campaign's contact list. How could one then not send the campaign again to those newly added/synced contacts?