Product Updates
Changelog
Everything we ship. New features, improvements, and fixes.
New Feature
v2.4.0April 5, 2026GTM Launch — Blog, Content Engine, ROI Calculator
- MDX-powered blog with Ink ShadCN template (17 posts, 8 categories)
- Email Verification ROI Calculator (interactive lead magnet)
- Competitor comparison pages (vs ZeroBounce, NeverBounce, Hunter, MillionVerifier, Kickbox)
- 30-term email glossary with deep content and cross-links
- Dynamic OG images per blog post (Satori/Next.js ImageResponse)
- RSS feed at /feed.xml
- Newsletter signup with server-side API
- Referral system — generate codes, track signups, earn credits
New Feature
v2.3.0March 24, 2026ZeroBounce Competitive Features & API Docs
- Standalone email scoring API (quality score without full verification)
- Domain deliverability testing (SPF/DKIM/DMARC/RBL analysis, A-F grade)
- GDPR compliance endpoints (export, delete, consent management)
- Blacklist monitoring with automated 6-hour checks and email alerts
- Swagger UI API documentation at /api/docs
- Dunning system for failed payments (auto-retry, grace period)
Integration
v2.2.0March 10, 2026Unified Integrations & Rich Export
- Unified IntegrationModal for Mailchimp, SendGrid, and HubSpot
- HubSpot OAuth flow (full bidirectional sync)
- Rich export: 6 fields (status, score, date, reason, risk_band, flags)
- Shared OAuth helpers, CSV helpers, integration helpers (deduplicated)
- Fixed route ordering: per-platform routes before generic /:platform
Improvement
v2.1.0March 8, 2026Job Processing Hardening & Schema Fixes
- Atomic job status claim (prevents double-processing race condition)
- CSV BOM stripping (UTF-8 BOM broke email column detection)
- Stricter email column detection with content-scan fallback
- .txt file upload support (one email per line)
- Per-domain SMTP concurrency semaphore (MAX_PER_DOMAIN=10)
- Exponential backoff for retries (1h → 24h, dead-letter after 6 attempts)
- PRAGMA foreign_keys=ON + ON DELETE CASCADE on all foreign keys
Security
v2.0.1March 7, 2026Security Remediation & Performance
- HMAC-SHA256 signatures for ESP webhooks
- SSRF prevention (private IP validation on webhook URLs)
- Removed query-string token authentication
- Rate limiting on all auth endpoints with crypto.randomInt OTP
- Memory leak fix in monitoring service (LRU eviction, 15min cleanup)
- Stripe webhook idempotency check
- OAuth states persisted to database (not in-memory)
Improvement
v2.0.0March 6, 2026Full Codebase Audit & PostgreSQL Compatibility
- PostgreSQL-compatible database abstraction layer
- GOD Rule compliance: likely_valid → ACCEPT_ALL_VALID
- Upfront credit charging with refund on cancel/fail
- DB-persistent webhook delivery queue
- 6 missing database indexes added for query performance
- Dashboard route rename: /home → /dashboard
- Widget minified (14.9KB → 6.7KB, 55% reduction)
New Feature
v1.5.0February 25, 2026Outcome Studio & Predictive Scoring
- Outcome Studio for campaign-level deliverability prediction
- Predictive engagement scoring (ML-powered)
- Deferred resolution for catch-all domains
- ESP connectors (Mailchimp, SendGrid initial)
- Admin dashboard consolidation
New Feature
v1.0.0February 15, 2026Initial Launch
- 27-stage email verification engine
- Real-time API with sub-3-second response
- Bulk CSV/XLSX upload and processing
- ML-powered catch-all domain resolution
- Disposable email detection (2,000+ providers)
- Quality scoring (0-100) with risk bands
- Embeddable form validation widget (<10KB)
- Pay-as-you-go credits with auto-refill
- Firebase authentication with team management