SenderSignal is email deliverability software that enhances sending reputation, monitors blacklists, and tests inbox placement. It offers automated domain warmup, blacklist monitoring, and inbox placement testing. The Inbox Boost feature automates domain warmup by setting up sending infrastructure, generating SPF, DKIM, and return-path records, and writing DNS entries into registrar accounts. A 28-day ramp increases sending volume while monitoring engagement and bounce rates, pausing if thresholds are exceeded. Blacklist monitoring checks domains and IPs against 45+ sources like Spamhaus and Barracuda, with alerts via Slack, email, webhooks, or PagerDuty. Inbox Intelligence tests placement across Gmail, Microsoft 365, Yahoo, and others, analyzing delivery path, authentication, spam triggers, and readability. A reputation score from zero to 100 traces deductions to blacklist sources or configuration issues. Integration options include a REST API and webhooks for external systems.
