Dev.to
6/22/2026

Land your AI agent's email in the inbox, not spam
Short summary
Setting up reliable email delivery for AI agents requires three authentication layers: DKIM cryptographic signatures, SPF authorization records, and DMARC policies that instruct providers how to handle failed authentication. Warm up new domains gradually over 4 weeks, starting with 5-15 daily emails to engaged recipients and ramping to 500+ daily. Monitor bounces and complaints through webhooks to maintain inbox placement and avoid spam filters.
- •Authenticate domains with DKIM, SPF, and DMARC before sending at volume
- •Warm up new domains over 4 weeks with gradual volume increases to engaged recipients
- •Monitor deliverability through webhooks and tighten DMARC policies as reports show clean authentication
Generated with AI, which can make mistakes.
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