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Transactional vs marketing email: compliance and infrastructure differences
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transactional emailmarketing emailemail compliancecan-spamgdprsending streamemail reputation
Problem
Mixing transactional and marketing emails (e.g., sending promotional content through the same stream as password resets) can cause deliverability problems and legal compliance violations. A spam complaint on a marketing email can affect delivery of critical transactional emails.
Solution
Use separate sending streams (different IP pools or subdomains) for transactional email (order confirmations, password resets, account alerts) and marketing email (newsletters, promotions). Transactional email is exempt from CAN-SPAM/GDPR opt-out requirements; marketing email is not.
Why
Email providers track reputation per sending stream. A high complaint rate on marketing emails will damage the IP/domain reputation used for that stream. If you use the same stream for transactional emails, those also get penalized.
Gotchas
- CAN-SPAM (US) and GDPR (EU) require clear unsubscribe mechanisms for commercial/marketing email
- Transactional exemption only applies if the email is solely transactional — adding any promotional content makes it subject to marketing regulations
- Use different From subdomains: notifications@yourdomain.com for transactional, hello@yourdomain.com for marketing
- Most ESPs provide separate API keys or sending identities per stream
Context
Applications sending both transactional and marketing emails
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