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Legitimate B2B outbound on SES in 2026: sandbox exit, SPF/DKIM/DMARC, RFC 8058, Microsoft May 2025 bars, warm-up, and when Pro DIPs beat shared pools — with a first-party compliance checklist.
On Jul 21, 2026 AWS shipped SES Essentials, Pro ($105/region), and Enterprise ($500/region). At 2M emails/mo a Pro-like a-la-carte stack runs ~$1,793 vs Pro plan ~$553 — switch only when you need the bundled stack.
When to keep Customer.io/Loops vs build journeys with EventBridge + Step Functions + SES — stream isolation, RFC 8058, Pro for DIPs, and a first-party journey architecture checklist.
SES tenants (GA Aug 2025) add $0.005/tenant/mo reputation isolation—when ISV platforms need them vs configuration sets alone, with IAM, pricing, and IaC.
Amazon SES is the most cost-effective email infrastructure for high-volume retail sending — but inbox placement requires dedicated IPs, proper authentication, and automated bounce handling. Here is how to do it right.