The EU email API for sending, inbound, and privacy
Send transactional emails, process inbound messages, protect user privacy with masked addresses. One API. EU-hosted. Global coverage.
Transactional Email API
Send transactional emails with a simple HTTP request. Track deliveries, opens, and clicks in real-time.
curl -X POST https://api.postscale.io/v1/send \
-H "Authorization: Bearer ps_live_..." \
-H "Content-Type: application/json" \
-d '{
"from": "hello@yourapp.com",
"to": ["user@example.com"],
"subject": "Welcome!",
"html_body": "<h1>Hello World</h1>"
}'Complete Email Infrastructure
Everything you need for email
Three products, one platform. Send transactional emails, process inbound messages, and protect user privacy — all through a single API.
Transactional Email Delivery
Send emails that reach the inbox. High deliverability, real-time tracking, and developer-friendly APIs.
High Deliverability
Optimized infrastructure and authentication (SPF, DKIM, DMARC) for maximum inbox placement rates.
Simple API
Send emails with a single API call. RESTful endpoints, SDKs for popular languages, and comprehensive documentation.
Real-time Analytics
Track deliveries, opens, clicks, and bounces in real-time. Webhooks for every event.
Template Support
Create and manage email templates with dynamic variables. Version control and A/B testing built-in.
Dedicated IPs
Get dedicated IP addresses for full control over your sending reputation. Available on Scale and Enterprise plans.
Automatic Retries
Failed deliveries are automatically retried with exponential backoff. Never lose an important email.
Inbound Email Processing
Parse incoming emails and deliver them to your application via webhooks. Build support systems, reply detection, and email-powered workflows.
Webhook Delivery
Receive parsed emails as JSON via webhooks. Sub-100ms delivery with automatic retries and signature verification.
Full Parsing
Extract headers, body (HTML and plain text), attachments, and metadata. Clean JSON output ready for your app.
Attachment Handling
Attachments are automatically stored and accessible via secure URLs. Support for files up to 25MB.
Routing Rules
Filter and route emails by sender, domain, subject, headers, or SPF/DKIM results. Supports regex, AND/OR logic, and actions like forward, drop, or store.
Threading Support
Automatic thread detection using In-Reply-To and References headers. Keep conversations organized.
Spam Filtering
Built-in spam detection with configurable thresholds. Keep your inbox clean and your app secure.
DMARC Reports
Automatic DMARC aggregate report collection and analysis. See who sends email as your domain and track DKIM/SPF alignment rates.
Privacy & Masked Emails
Protect user privacy with masked email addresses. Create aliases that forward to real addresses while keeping identities hidden.
Masked Addresses
Generate unique email aliases for each user or service. Real email addresses stay private and protected.
Reply from Alias
Users can reply from their masked address. Outgoing emails are automatically rewritten to maintain privacy.
Per-User Controls
Enable, disable, or delete aliases individually. Give users full control over their masked addresses.
Custom Domains
Use your own domain for masked addresses. Maintain brand consistency while protecting privacy.
PGP Encryption
Optional PGP encryption for forwarded emails. End-to-end privacy for security-conscious users.
Tracker Blocking
Remove tracking pixels and rewrite tracking links. Protect users from email surveillance.
Platform Features
Built for developers, designed for scale. Every feature you need to build reliable email infrastructure.
Global Infrastructure
EU-hosted with regions in Europe, US, and Asia-Pacific. GDPR compliant by default.
API-First
RESTful API with comprehensive documentation. SDKs for Node.js, Python, Go, Ruby, and more.
99.99% Uptime
Enterprise-grade infrastructure with redundant systems. SLA guarantees available.
Security First
TLS encryption, webhook signatures, API key rotation, and audit logs on all plans.
Why Postscale?
The only platform that combines transactional email, inbound processing, and privacy features in one unified API.
| Feature | Mailgun | SendGrid | SimpleLogin | Postscale |
|---|---|---|---|---|
| Transactional Email | ✓ | ✓ | — | ✓ |
| Inbound Webhooks | ✓ | ✓ | — | ✓ |
| Inbound Rules | ✓ | — | — | ✓ |
| Masked Emails | — | — | ✓ | ✓ |
| Reply from Alias | — | — | ✓ | ✓ |
| Data Sovereignty | Partial | Partial | ✓ | ✓ |
| Single Unified API | — | — | — | ✓ |
| PGP Encryption | — | — | ✓ | ✓ |
| DMARC Reports | — | — | — | ✓ |
Built for your stack
Email infrastructure maps differently depending on what you're building. Here's how teams in each space use Postscale.
For SaaS
Transactional mail, inbound support inboxes, masked privacy addresses — one API key, standard EU DPA.
For e-commerce
Order confirmations, shipping updates, return RMAs, and XRechnung-compliant B2B invoicing in one platform.
For healthtech
Patient reminders and secure messaging from EU infrastructure with a GDPR-ready DPA. No US data processor relationship.
Free email tools
Quick-diagnosis utilities we use every time we onboard a customer. Point them at any domain or paste any record — nothing is uploaded to our servers.
SPF record checker
Walk the include/redirect tree, count lookups against the 10 limit.
DKIM record lookup
Selector + domain → parsed TXT, key size estimate, weak-key warnings.
DMARC policy checker
Fetch DMARC, score enforcement 0–5, recommend next steps.
DMARC aggregate parser
Paste RUA XML → per-source records, alignment, pass rate.
Email headers analyzer
Paste raw headers → routing hops, timing, SPF/DKIM/DMARC pills.
See all toolsReady to get started?
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