Preference center

Most people who hit "unsubscribe" don't hate you — they hate the frequency or the topic. The preference center gives them a third option between "everything" and "nothing".

What the contact sees

A hosted page at GET /preferences?token=… where they can:

• toggle channels (email yes, SMS no),
• pick topics from your catalogue (newsletter, offers, product updates…),
• or unsubscribe from everything — it must always be easy, and it is.

The link is signed per contact (no login needed, no way to open someone else's preferences) and belongs in every email footer, which the default templates already handle.

Setting up topics

Define your topic catalogue under Settings → Preferences (API: /v1/preferences/topics). Keep it short and honest — three to six topics a human can tell apart. Changes save via POST /v1/preferences/save and take effect immediately: campaign and journey sends check topic membership at send time.

Targeting by topic

When creating a campaign you pick the topic it belongs to; contacts who opted out of that topic are excluded automatically. In the segment builder, topic membership is a filterable property, so "subscribed to offers AND inactive 60 days" is a perfectly normal segment.

Why this is worth an afternoon

Deliverability compounds: every unsubscribe you convert into "fewer topics" keeps list size, and every send to people who actually chose the topic raises engagement — which is exactly what inbox providers score you on.