The email API that keeps your data in Europe.
A developer-first email API with full data sovereignty. Send and receive transactional email — hosted entirely in the EU.
Join developers across Europe building with Postulate.
Free tier at launch — no credit card required.
Order confirmation #EU-4821
to klara.mueller@firma.de
Password reset requested
to jean.dupont@agence.fr
Invoice #INV-2024-0392
to buchhaltung@schmidt-gmbh.de
Welcome to your new account
to sophie.laurent@courrier.fr
Shipping notification DE-7291
to info@altes-buero.de
Built for trust, from the ground up.
EU Data Sovereignty
Servers in Germany and Finland. No US cloud providers. No transatlantic data transfers. Your data never leaves the EU.
Developer-First
Simple HTTP API for inbound and outbound email. Webhooks, rules engine, and DKIM/SPF/DMARC — configured out of the box.
Deliverability Built In
Rate limiting, bounce handling, and spam filtering from day one. We protect your sender reputation so your emails actually arrive.
Your email data deserves better.
Data location
GDPR compliance
Cloud dependency
Built for developers.
const response = await fetch(
"https://api.postulate.eu/v1/send",
{
method: "POST",
headers: {
"Authorization": `Bearer ${API_KEY}`,
"Content-Type": "application/json"
},
body: JSON.stringify({
from: "noreply@yourapp.eu",
to: "klara.mueller@firma.de",
subject: "Order confirmation #EU-4821",
html: "<h1>Thank you!</h1>"
})
}
);Everything you need, out of the box.
Webhooks, forwarding, tracking, contacts — a complete email platform running on European infrastructure.
Webhooks
Deliver matching emails to your endpoints via POST or PUT. Custom headers, payload control, and automatic retries with exponential backoff.
Email Forwarding
Route inbound emails with flexible rules. Match on sender, recipient, subject, headers, or body content with regex support.
Open & Click Tracking
Opt-in engagement tracking per email. Monitor opens, link clicks, and delivery events in real time.
Contact Lists
Manage subscribers with lists, tags, and custom attributes. CSV import/export and built-in GDPR consent tracking.
Bounce & Complaint Handling
Automated DSN parsing with hard and soft bounce classification. Bad addresses are suppressed before they hurt your reputation.
Domain Authentication
Auto-generated DKIM keys, SPF, and DMARC records per domain. Verification and warmup tracking out of the box.
Get started in minutes.
yourapp.eu
Verifiedpostulate._domainkey.yourapp.eu → v=DKIM1; k=rsa; p=MIGfMA0G...
yourapp.eu TXT → v=spf1 include:spf.postulate.eu ~all
_dmarc.yourapp.eu TXT → v=DMARC1; p=quarantine; rua=mailto:dmarc@postulate.eu
Be the first to know when we launch.
Join the waitlist and we'll notify you when Postulate is ready.