Mail merge sends personalized emails to many recipients using variables from a list. Learn how mail merge works and how to avoid deliverability mistakes.
Mail merge is a method of sending similar emails to many recipients while personalizing fields like name, company, or custom attributes. It typically uses a contact list (CSV or database) and a template with merge tags.
Mail merge can feel one-to-one when done well, but it can also look spammy if personalization is shallow or list quality is poor. Deliverability depends heavily on sending pace, engagement, and complaints.
Best practices include using accurate data, keeping templates simple, and verifying recipients where possible. Also avoid sending massive volumes from a brand-new domain without a gradual sending plan.