// COMPLIANCE
Bulk sender requirements (Google/Yahoo 2024)
Bulk sender requirements are the 2024 rules from Google and Yahoo mandating SPF, DKIM, DMARC, one-click unsubscribe, and spam complaint rates under 0.3% for senders above 5,000/day.
Affects cold email at scale. Non-compliance = mass spam folder placement, not just throttling.
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