SMTPGrid

What it does

SMTPGrid is built for SaaS companies, ESPs, agencies, marketing teams, and enterprises sending high-volume emails. It intelligently routes traffic based on ISP, provider performance, and custom rules to improve deliverability and sender reputation. Features include automatic failover, mailbox warm-up, dedicated IPs, suppression management, bounce handling, webhooks, IP whitelisting, and real-time analytics.

Connect AWS SES, SendGrid, Mailgun, Google Workspace and 15+ providers to a single intelligent SMTP endpoint. ISP routing, dedicated IPs, mailbox ramp-up and auto-failover. Free plan available.

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