Fix signup email deliverability by automating auth, warm-up, and content checks

Fix signup email deliverability by automating auth, warm-up, and content checks targets a $4.8B = 1.6M target SaaS and SMB businesses globally x $3K ACV (annual deliverability tooling, monitoring, and remediation) total addressable market with medium saturation and a year-over-year growth rate of 10-20% annual growth as reliance on email automation and mailbox enforcement rises.

Key trends driving demand: increasing-dmarc-enforcement -- major mailbox providers are enforcing auth, making unauthenticated mail more likely to be dropped; segregation-of-transactional-mail -- best practice to separate transactional from marketing to protect reputation; API-driven-email-infrastructure -- ESPs and DNS providers now expose APIs enabling automation of warm-up and auth provisioning.