We built the email infrastructure we wanted to use
SadaSend is an independent transactional email platform and Model Context Protocol (MCP) server engineered for developers and autonomous AI agents. We own our delivery path end-to-end, host our sovereign infrastructure in Germany (EU), and build wire-level safety ceilings into every API key.
Tayyab Mughal
Tayyab Mughal founded SadaSend to give software developers and AI agent builders an honest, sovereign transactional email infrastructure. Frustrated by legacy providers reselling AWS SES with inflated price markups and offering zero protection against runaway AI agent loops, he engineered SadaSend from first principles with sovereign direct-to-MX dispatch, in-flight bounce shielding, and server-enforced safety guardrails.
"Email infrastructure should be boring where it touches the wire, and radically transparent where it protects your domain. If an email provider charges you for sending to a dead address, they are profiting from your deliverability mistakes. We believe in 100% zero-debit verification and total cryptographic sovereignty."
Tayyab Mughal
Founder & Chief Architect
How We Build SadaSend
We reject inflated middleman markups and blackbox rate limits. Here are the core architectural commitments we enforce on every dispatch.
Boring where it carries mail
When delivering password resets, OTP codes, and critical billing receipts, we choose proven, boring protocols. Our transmission engine speaks direct RFC 5321 ESMTP with STARTTLS encryption and dual 2048-bit DKIM signatures.
Deterministic safety where agents run
Autonomous AI agents and automated background jobs operate non-deterministically. Handing them an unconstrained API key risks runaway billing and domain reputation burns. We engineer hard safety ceilings directly into the wire: recipient allowlists, hourly send limits, SpendGuard $0 floors, and human approval queues.
Zero AWS SES middleman markups
Most modern developer email APIs are aesthetic wrappers reselling Amazon SES behind customized UI dashboards. When AWS SES experiences regional degradation or reputation probation, customers have no control. We built our own sovereign mail transmission engine to guarantee sub-second delivery and independent deliverability.
100% Zero-Debit Guarantee
Legacy email APIs bill you for every failed attempt, broken MX lookup, and spam trap hit. At SadaSend, our in-flight pre-send shield intercepts invalid syntax, disposable burners, and dead domains before transmission. If an email is blocked by safety guardrails, exactly $0.00 is billed and zero sends are deducted.
Zero customer email training & strict isolation
Your email bodies, recipient lists, and message attachments belong strictly to you. We never train AI models on customer email contents, enforce isolated tenant partitions, and automatically purge historical message bodies according to your chosen plan retention window (30 to 90 days).
Subprocessor & Infrastructure Transparency
We process customer data with total transparency. We host our primary relays in the European Union and enforce strict plan-based automatic storage purging.
| Subprocessor | Role | Data Center Region | Operational Purpose |
|---|---|---|---|
| Hetzner Online GmbH | Server Infrastructure & Relay Hosting | Germany (European Union) | Dedicated bare-metal servers and cloud nodes hosting our sovereign MTA dispatch engine, queue storage, and encrypted PostgreSQL database instances. |
| Cloudflare, Inc. | Edge Network, DNS & Encrypted Storage | Global Edge / European Union | Global DNS routing, DDoS mitigation, edge caching, Web Application Firewall (WAF), and Cloudflare R2 for zero-egress encrypted attachment storage. |
| Paddle.com Market Ltd | Merchant of Record & Payment Gateway | United Kingdom / Ireland (EU) | PCI-DSS Level 1 payment processing, multi-currency SaaS billing, invoice generation, and global tax compliance (VAT, GST, sales tax). |
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