Scaling Email Delivery: From 10K to 10M Emails Per Month with PostMTA

PostMTA scales from small volume to millions of emails per day. Key scaling strategies include: IP pool rotation for reputation management, configurable throttling per ESP, multi-threaded delivery architecture, and bounce rate management that keeps sender reputation intact. Unlike cloud APIs with per-email costs, PostMTA's flat-rate pricing makes scaling economical. Start at any volume at https://postmta.com