EU transactional email provider for product teams

Send password resets, receipts, magic links, order confirmations, alerts, and product notifications through an EU-operated email API. Postscale combines transactional sending, SMTP relay, inbound webhooks, masked addresses, DMARC reporting, and EU/EEA-hosted primary service data under one developer-first platform.

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Transactional send

POST /v1/send

REST API + SMTP relay

EU/EEA-hosted primary service data

Standard GDPR DPA

DKIM, DMARC, and SPF setup support

Delivery, bounce, deferred, and complaint webhooks

event: delivered
method: REST or SMTP
region: EU/EEA primary service data

REST API + SMTP relay

EU/EEA-hosted primary service data

Standard GDPR DPA

DKIM, DMARC, and SPF setup support

Delivery, bounce, deferred, and complaint webhooks

What makes Postscale an EU transactional email provider?

Postscale is built for teams that need application email without routing their core email workflow through a US-first provider. Use it for transactional messages such as password resets, receipts, invoices, notifications, account alerts, and magic links. Primary production service data is hosted in the EU/EEA, with documented safeguards for limited operational metadata where required. For a transactional email provider EU shortlist, the practical checks are hosting posture, REST and SMTP coverage, webhook depth, and processor documentation.

Transactional Email API GDPR and EU email API comparison

Send with REST API or SMTP relay

Choose the integration path that matches your application. Both methods share Postscale delivery logs, suppressions, and webhook events.

REST API

Use REST when your application controls the sending logic. Trigger transactional email from your backend, attach metadata, and receive signed delivery events through webhooks.

REST sending docs

SMTP relay

Use SMTP relay when migrating an existing app, framework, CMS, or legacy integration that already speaks SMTP. Swap the host, credentials, and sender domain while keeping the same delivery, logs, and webhook pipeline.

EU SMTP relay

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 to Acme!",
    "html_body": "<h1>Hello World</h1>",
    "text_body": "Hello World"
  }'

Use cases for product email

Password resets

Send high-priority account recovery messages with authenticated sender domains and delivery events.

Magic links and OTPs

Trigger short-lived login messages from your backend through the same transactional email pipeline.

Order confirmations

Confirm purchases and status changes with metadata attached for product and support teams.

Receipts and invoices

Send billing receipts and invoice notifications while keeping product email in one platform.

Product notifications

Deliver account, workspace, collaboration, and lifecycle notifications from your application.

Security alerts

Notify users about sign-ins, device changes, password updates, and account-risk events.

Trial and billing lifecycle emails

Send transactional email for trial starts, renewals, failed payments, and plan changes.

Operational notifications

Route internal alerts and workflow messages through the same logs, webhooks, and suppressions.

GDPR documentation

EU/EEA-hosted primary service data and GDPR documentation

Postscale is designed for teams that need an EU-operated email infrastructure partner and clear processor documentation. Primary production service data is hosted in the EU/EEA. A standard GDPR DPA and documented subprocessors help procurement, legal, and engineering teams evaluate the service without a long vendor-discovery cycle.

Data Processing Agreement Privacy policy Subprocessors GDPR comparison

Compare EU transactional email provider options

Choosing an EU transactional email provider depends on whether you need only SMTP relay, a full REST API, inbound processing, migration tools, or broader marketing automation.

Provider	Best fit	REST API	SMTP relay	Inbound processing	Notes
Postscale	Product and developer email workflows	Included	Included	Included	EU-operated API platform for transactional sending, SMTP relay, inbound webhooks, masked addresses, DMARC reporting, and EU/EEA-hosted primary service data.
Brevo	Marketing plus transactional email platform	Provider-specific	Provider-specific	Provider-specific	Broad email and customer-engagement suite with transactional email features.
Mailjet	Marketing plus transactional email platform	Provider-specific	Provider-specific	Provider-specific	Email platform for teams that want campaign tooling and developer sending in one suite.
Scaleway Transactional Email	Cloud-provider transactional email service	Provider-specific	Provider-specific	Provider-specific	Cloud-provider transactional email service for teams already using that infrastructure.
Lettermint	Developer-focused transactional email provider	Provider-specific	Provider-specific	Provider-specific	Developer-focused transactional email provider.
AhaSend	Developer-focused transactional email provider	Provider-specific	Provider-specific	Provider-specific	Developer-focused transactional email provider.
Sweego	Transactional and product messaging workflows	Provider-specific	Provider-specific	Provider-specific	Transactional email and product messaging provider.

Postscale focuses on product and developer workflows rather than newsletter marketing.

Migration

Migrate from your current email provider

Most transactional email migrations start with domain authentication, API key creation, event webhook mapping, and a staged cutover.