How do transactional and marketing mix affect placement?

Transactional and marketing email mix considerations:

Shared reputation: If both types use the same domain, reputation aggregates. Poor marketing performance can affect transactional delivery.

Separation option: Use separate subdomains to isolate marketing reputation from transactional.

Transactional strength: High engagement on transactional (receipts get opened) can boost domain reputation.

Marketing risk: Aggressive marketing with complaints can damage shared reputation.

Consider your risk tolerance. Separation provides protection. Integration may benefit from transactional engagement.

Merchant cargo and passenger service can share a ship or sail separately. Each has trade-offs.