Marketing emails fall into five main types: welcome, transactional, promotional, re-engagement, and newsletter. Each one triggers on a different subscriber action and serves a different stage of the buying journey, so sending the wrong type at the wrong moment is what makes subscribers unsubscribe or mark a brand as spam.
What Is a Welcome Email?
A welcome email sends automatically the moment someone subscribes to a newsletter or creates an account. It sets the tone for every email that follows, so it needs to get the subscriber to open and click something within the first message.
A welcome email should thank the subscriber by name, explain what content they'll receive and how often, and give them one clear next action, often a discount code for a first purchase. Klaviyo's 2023 benchmark data found welcome emails average a 68.6% open rate, among the highest of any automated email type, because the subscriber just took an action and expects a reply (Klaviyo, 2023).
What Is a Transactional Email?
A transactional email confirms an action the subscriber already completed: a purchase, a shipment, a password reset, or an account change. It is not promotional, and it should read that way.
Transactional emails get opened at a far higher rate than promotional email because the subscriber is actively waiting for the information inside, such as a receipt or a tracking number. Confirm the action clearly in the subject line, then use the body to build the relationship: a shipping confirmation can include a related product, but the confirmation itself always comes first.
What Is a Promotional Email?
A promotional email announces a sale, a new product, or a limited-time offer with the direct goal of driving a purchase. Unlike a welcome or transactional email, it is not triggered by subscriber behavior; it is scheduled and sent to a segment.
Promotional emails work best when they are sent to a segment that already showed interest in the product category, rather than blasted to an entire list. Frequency matters here more than any other email type: subscribers who receive too many promotional emails unsubscribe faster than they convert.
What Is a Re-Engagement Email?
A re-engagement email targets subscribers who stopped opening emails, typically after 60 to 90 days of inactivity. Its goal is to win the subscriber back or get them to unsubscribe cleanly, both of which protect the sender's deliverability.
An inactive subscriber who never opens a brand's emails still counts against that brand's spam filter reputation with major inbox providers. A re-engagement email that asks "are you still interested?" and offers an easy unsubscribe link protects the list's health even when the subscriber does not come back.
What Is a Newsletter Email?
A newsletter is a recurring, scheduled email that shares company news, content, or industry updates rather than pushing a single transaction. It builds an ongoing relationship instead of asking for an immediate purchase.
Newsletters work as a brand-building tool precisely because they do not ask for anything every time. A consistent, useful newsletter is one of the assets a communications plan can rely on to keep an audience engaged between major campaigns or launches.
Which Email Type Should a Company Send First?
Set up the welcome and transactional emails first, since both trigger automatically and require no ongoing content creation once built. Add a newsletter once there is a content cadence to support it, then layer in promotional and re-engagement emails as the list grows large enough to segment meaningfully.
