CAN-SPAM and Sending Compliance
How Mule Mail helps you meet CAN-SPAM, and what stays your responsibility.
Last updated May 17, 2026
This document is operator-provided content for the Mule Mail product and should be reviewed by qualified counsel before public launch.
CAN-SPAM is the United States law for commercial email. CASL (Canada) and GDPR/PECR (Europe) add stricter consent rules. Mule Mail is built so the mechanics are handled for you; the relationship with your recipients stays yours.
What Mule Mail enforces for you
- Unsubscribe in every email. The
{{unsubscribe_url}}merge tag is validated on template save. A campaign without a working unsubscribe cannot send. - One-click, no login. Unsubscribe is honoured immediately, well inside the law's window, and also exposed via the List-Unsubscribe header (RFC 8058).
- Suppression. Unsubscribes, hard bounces, and complaints are added to your suppression list and excluded from every future send.
- Physical address. Your organisation's postal address is a setting and is validated before sending, because the law requires it in the message.
What stays your responsibility
- Truthful headers and subject. Do not mislead about who the mail is from or what it is about.
- Consent. CAN-SPAM allows some mail without prior consent; CASL and GDPR often do not. If you have EU or Canadian recipients, use double opt-in. Mule Mail defaults double opt-in on for lists in regions that need it.
- Honouring opt-outs across systems. If you collect addresses elsewhere too, keep suppression consistent. The API and webhooks exist to help you do that.
Double opt-in
Enable it per list. The contact is not active until they confirm. For EU-detected organisations it is on by default. It costs you a few signups and saves you a deliverability problem.
This page explains how the product helps. It is not legal advice. Confirm your obligations for the regions you send to with counsel before launch.
Contact: support@blastforge.com.