Deliverability fundamentals
The five factors that decide inbox vs spam.
Deliverability5 steps
- 01Authentication: SPF, DKIM, DMARC all passing.
- 02Reputation: domain & IP history, built by warmup.
- 03Volume: gradual, consistent, human-scale sending.
- 04Content: plain, personal, no spam patterns.
- 05Engagement: replies help; spam complaints kill. Optimize all five.
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