Following up an abandoned cart
Most abandonment is a question, not indecision. Answer the question.
Diagnose from the cart
Reached shipping and stopped → the shipping cost or the delivery date. Sat on sizing → fit uncertainty. Repeated visits to one item → a specification they cannot find. Payment page → a method you do not offer.
Write to that
One message, one objection, answered concretely: the actual delivery date, the returns terms in one line, the size chart, the missing specification.
Discount last, if at all
A discount on the first message teaches the customer to abandon. If the diagnosis is price, say what the price includes rather than reducing it.
Rules
Two messages maximum, at least a day apart, both with a one-click way to stop. Never send after they have bought — check first, every time.
Never
Fabricate scarcity, invent a countdown, or claim stock is low unless the record says so.