Why does a birthday email work so well?

Why does a birthday email work so well?

A birthday email is an automatic note (often with a small treat) sent on a subscriber's special day. It feels personal because, for once, it's about them.

Why it matters: a coffee brand collected birthdays at signup but never used them. A whole field of goodwill sat unused.

Here's the setup:
— Step 1: turned on a one-time automation that fires on each person's birthday
— Step 2: ✅ included a simple "happy birthday, here's 15% off this week"
— Step 3: tracked redemptions over a full year

Result: birthday emails had a 48% open rate (more than double their usual) and one of their highest sales-per-email of any message.

Tiny homework: check if you collect birthdays at signup. Just look.

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