---
title: FAQ
description: Why Sendoff is built the way it is, and what it does and doesn't do.
sidebar:
  icon: circle-help
---

**Why Amazon SES, and not Cloudflare's own email service?**

Cloudflare's Email Service is for transactional email, like receipts and
password resets, so it doesn't allow newsletters or announcements. SES does,
and it's about as cheap as sending gets: $0.10 per thousand emails.

**Why does it need Workers Paid?**

Rendering an email takes about 30 ms of CPU when a Worker starts cold, and
the free plan allows 10 ms per request. Sendoff renders each issue once and
fills in each person's unsubscribe link, so sending stays cheap, but the
render itself needs the headroom.

**Can I use it without an agent?**

Mostly no, on purpose. There's no admin dashboard: you draft, send and
manage subscribers by talking to Claude or Codex. Any MCP client works, and
the [REST API](/docs/reference/rest-api) covers signups and imports from
your own code.

**Can the agent send without asking me?**

Sendoff makes it hard to send by accident. A send needs a test of the exact
version, then a prepare step that returns a summary and a confirmation that
expires in 15 minutes, and the agent is told to confirm only after you
explicitly say to send. Keep the MCP token private: anyone with it can do
what your agent can.

**Does it track opens and clicks?**

Clicks, yes: links go through your own Sendoff domain, and clicks from email
security scanners are filtered out. Opens are off by default, because Apple
Mail loads every image automatically, but you can turn them on. Ask your
agent "how's my latest send doing?" See [Issue stats](/docs/guides/stats).

**Do I need a postal address?**

Only for commercial email, like launches and promotions: US and Canadian law
require one there. It's optional in Sendoff. Without one, each issue is
checked before it's sent, and any that reads as commercial is blocked until
you add an address or rework it. See [When you need a postal
address](/docs/guides/deliverability#when-you-need-a-postal-address).

**Can I customize the email design?**

You set the name or logo, the accent color, the footer links and the postal
address. The layout itself is fixed and built to render consistently across
Gmail, Apple Mail, Outlook and dark mode, so there's no template to
maintain.

**Can I have more than one list?**

One deployment sends to one list. There are no segments or tags.

**Where do my subscribers' details live?**

In a D1 database in your Cloudflare account. Nothing goes to a third party
except what SES needs to deliver each email. To leave, ask the agent to list
your subscribers, or export the database with `wrangler d1 export`.

**Is there a web archive of past issues?**

Not yet; a web archive, RSS and image uploads are planned. In the meantime,
you can [import past issues](/docs/guides/past-issues) from another
provider, so nothing you've sent is lost.