manus-skills/.kortix/opencode/skills/content/email-best-practices/references/compliance.md

Email Compliance

Legal requirements for email by jurisdiction. Not legal advice—consult an attorney for your specific situation.

Quick Reference

Law	Region	Key Requirement	Penalty
CAN-SPAM	US	Opt-out mechanism, physical address	$53k/email
GDPR	EU	Explicit opt-in consent	€20M or 4% revenue
CASL	Canada	Express consent, opt-out mechanism	$1M (individual) to $10M (organization) CAD

CAN-SPAM (United States)

Requirements:

• Accurate header info (From, To, Reply-To)
• Non-deceptive subject lines
• Physical mailing address in every email
• Clear opt-out mechanism
• Honor opt-out within 10 business days

Transactional emails: Can send without opt-in if related to a transaction and not promotional.

GDPR (European Union)

Requirements:

• Explicit opt-in consent (not pre-checked boxes)
• Consent must be freely given, specific, informed
• Easy to withdraw consent (as easy as giving it)
• Right to access data and deletion ("right to be forgotten")
• Process unsubscribe immediately

Consent records: Document who, when, how, and what they consented to.

Transactional emails: Can send based on contract fulfillment or legitimate interest.

CASL (Canada)

Consent types:

• Express consent: Explicit opt-in (ideal)
• Implied consent: Existing business relationship (2 years) or inquiry (6 months)

Requirements:

• Clear sender identification that will be valid for 60 days after send
• Unsubscribe functional for 60 days after send
• Process unsubscribe no later than 10 business days
• Keep consent records 3 years after expiration

Other Regions

Region	Law	Key Points
Australia	Spam Act 2003	Consent required, honor unsubscribe within 5 days
UK	PECR + GDPR	Same as GDPR
Brazil	LGPD	Similar to GDPR, explicit consent for marketing

Unsubscribe Requirements Summary

Law	Timing	Notes
CAN-SPAM	10 business days	Must work 30 days after send
GDPR	Immediately	Must be as easy as opting in
CASL	10 business days	Must work 60 days after send

Universal best practices: Prominent link, one-click when possible, no login required, free, confirm action.

List-Unsubscribe Header (Required for Bulk Senders)

Gmail, Yahoo, and Microsoft require List-Unsubscribe headers. Without them, bulk emails may be rejected or spam-filtered.

Required headers:

headers: {
  'List-Unsubscribe': '<https://example.com/unsubscribe>',
  'List-Unsubscribe-Post': 'List-Unsubscribe=One-Click',
}

Your unsubscribe endpoint must:

• Accept POST requests — return 200 or 202 with a blank page
• Display standard unsubscribe page for GET requests
• Stop sending within 48 hours of the request

Managing preferences vs Unsubscribe from all

Most legistlations require a one-click unsubscribe. Managing preferences is a nice-to-have and can lead to lower unsubscribe rate but doesn't replace Unsubscribe. If possible, offer both.

Consent Management

Record:

• Email address
• Date/time of consent
• Method (form, checkbox)
• What they consented to
• Source (which page/form)

Storage: Database with timestamps, audit trail of changes, link to user account.

Data Retention

Law	Requirement
GDPR	Keep only as long as necessary, delete when no longer needed
CASL	Keep consent records 3 years after expiration

Best practice: Have clear retention policy, honor deletion requests promptly, review and clean regularly.

Privacy Policy Must Include

• What data you collect
• How you use data
• Who you share data with
• User rights (access, deletion)
• How to contact about privacy

International Sending

Best practice: Follow the most restrictive requirements (usually GDPR) to ensure compliance across all regions.

Related

• Email Capture - Implement consent forms and double opt-in
• Marketing Emails - Consent and unsubscribe requirements
• List Management - Handle unsubscribes and deletion requests