Connect multiple email providers behind one unified routing layer. Route primary volume through AWS SES ($0.10/1k), fail over automatically to Resend or Brevo during outages, and protect your domain with our patent-pending Smart Airbag™ Zero-Drop velocity sandbox.
Relying on a single Email Service Provider (ESP) creates an immediate operational risk for modern SaaS products and digital platforms.
When your sole email vendor experiences a global outage or temporarily pauses your sending IP, your user signups, OTP verifications, and invoice receipts fail immediately.
Coupling your application code directly to SendGrid, Mailgun, or Resend APIs makes switching providers painful. Changing vendors requires code rewrites and complex deployments.
Unexpected traffic spikes can push your account over monthly quotas, resulting in rejected emails or exorbitant per-thousand overage charges from traditional email services.
Solidrix Send sits between your application and your email providers, guaranteeing high availability, intelligent failover, and complete deliverability observability.
Automatically fallback to backup providers like Resend or Postmark within milliseconds if your primary gateway fails or hits quota limits.
Connect using our high-speed REST API or point any standard SMTP client to send.solidrix.com:587 without code changes.
Separate mission-critical transactional OTPs from bulk marketing broadcasts to protect domain reputation and maximize inbox placement.
Inspect incoming webhooks in real-time with our Request Bin, track exact message timelines, and view live SSE dispatch streams.
What happens when a runaway infinite loop, compromised API token, or rogue marketing blast triggers 50,000 emails in 60 seconds? Traditional ESPs ban your account and drop your emails. Solidrix Send deploys the Smart Airbag™.
Traditional email platforms treat sudden volume surges as adversarial attacks, protecting their own infrastructure at the direct expense of your business.
Instead of failing the dispatch, our sub-second velocity circuit breaker captures the spike and isolates it into a resilient holding tank.
Define custom thresholds per brand (e.g. max 500 emails / 5 min). When volume trips the breaker, the Airbag engages automatically in microseconds.
Spike traffic is quarantined safely in memory with atomic operations, preventing database lockups and preserving complete transactional metadata.
Instant notification via webhook or email with a direct link to the Holding Tank console to review, release, or purge quarantined batches.
Mix and match high-deliverability APIs with cost-effective bulk gateways for absolute reliability.
When you use shared email services, your tracking links look like links.sendgrid.net or trk.mailgun.org. If another company on that domain sends spam, your inbox deliverability plummets.
Solidrix Send enables 100% white-label custom tracking domains (track.yourbrand.com) with automated CNAME DNS validation.
Zero shared link footprint with noisy third-party marketers or bad senders.
Real-time DNS check verifies DNS propagation and DKIM alignment in seconds.
Fully compliant with 2026 Google and Yahoo bulk-sender inbox authentication policies.
Route primary traffic through AWS SES ($0.10 / 1,000 emails) while maintaining instant fallback to premium gateways.
Compare self-hosted infrastructure economics with modern developer agility, automated failover, and proactive domain protection.
| Capability / Architecture |
Solidrix Send 2.0
|
Legacy Sendy | Twilio SendGrid | Resend |
|---|---|---|---|---|
| Cost for 100k Emails / Mo | $10.00 (AWS SES) | $10.00 (AWS SES) | $89.95 / mo | $80.00 / mo |
| Automatic Multi-Gateway Failover | ✔ Sub-second Cascade | ✖ No (Hard SES lock) | ✖ No (Single vendor) | ✖ No (Single vendor) |
| Smart Airbag™ Velocity Quarantine | ✔ Zero-Drop Holding Tank | ✖ No circuit breaker | ✖ Hard 429 bounce | ✖ Rate limit drop |
| Custom Tracking Domains (CNAME) | ✔ Automated DNS Check | Manual / Basic | Enterprise tier only | Paid add-on |
| Global Suppression Engine | ✔ Atomic Redis 5 direct | Slow MySQL table scan | Cloud suppression | Standard API list |
| Developer Port 587 ESMTP Proxy | ✔ Workerman Daemon | ✖ Web UI only | Shared SMTP relay | Limited SMTP |
| Live SSE Real-Time Event Stream | ✔ Built-in EventSource | ✖ None | Webhooks only | Dashboard only |
| Agency Multi-Tenant Workspaces | ✔ Full Brand Isolation | Basic brand tabs | Sub-accounts ($$$) | Workspaces |
We understand that email contains highly sensitive PII. Solidrix Send is built with zero-trust architecture, robust encryption, and absolute data isolation.
All data transfers use TLS 1.3 encryption. Sensitive database payloads are secured with AES-256 encryption.
We never sell, rent, or scan your subscribers. Includes full "Right to Forget" and permanent data deletion options.
Upcoming E2EE package based on Public/Private Key cryptography. Zero-knowledge architecture where even our servers cannot read your payloads.
Strict Role-Based Access Control (RBAC) and active security pipelines as we move towards official SOC 2 Type II certification.
Solidrix Send infrastructure is hosted on isolated, VPC-protected environments with enterprise-grade DDoS mitigation.
Set up your email routing infrastructure in minutes and keep your emails delivered seamlessly.
Add credentials for AWS SES, Zoho, Resend, Mailgun, or Custom SMTP. Credentials are encrypted at rest.
Set up priority cascades, daily sending quota thresholds, and automatic failover triggers.
Set your velocity spike limit. Traffic anomalies are buffered in the Zero-Drop sandbox with 1-click review.
If a gateway goes down or reaches its quota limit, traffic switches instantly to your standby provider.
Inspect complete message timelines, real-time SSE logs, and incoming webhook payloads with zero blind spots.
Protect your signup conversion rates, billing receipts, and password reset delivery. Ensure your core product never stops communicating due to an ESP outage.
Manage every client's email infrastructure from one place. Isolate client domains, track usage per brand, and manage sending gateways seamlessly.
Deep-dive architectural playbooks, deliverability blueprints, and official release notes from the Solidrix engineering team.
We are thrilled to announce Solidrix Send 2.0 — featuring the revolutionary Smart Airbag velocity circuit breaker, zero-drop quarantine buffer, and automated multi-provider failover.
Learn how Solidrix Send Smart Airbag automatically trips circuit breakers during sudden volume surges, buffering outbound traffic in an isolated sandbox with 1-click human review.
A single email provider is an unacceptable single point of failure for modern SaaS. Discover how Solidrix Send routes primary traffic via AWS SES while maintaining automatic fallback to Resend and Postmark.
Solidrix Send enforces rigorous data isolation, encryption at rest, and active threat prevention across all message streams.
All gateway API keys and SMTP passwords are encrypted at rest using AES-256.
High-performance Workerman background daemon with self-healing DB connections.
Automatic verification of SPF, DKIM, and DMARC records to maximize deliverability.
Native Model Context Protocol server enabling AI tools (Claude / Cursor) to inspect logs.