Postscale Blog

What actually changes when you move transactional sending from Mailgun to an EU-hosted provider — DNS, SDK, events, inbound, and the migration-week checklist.

Walk through parsing DMARC aggregate (RUA) XML reports in three languages. Schema handling, gzip/zip unpacking, and aggregating records across multiple reports.

Side-by-side look at four transactional email APIs — pricing, features, EU-compliance posture, and when to pick each.

Warming an IP versus warming a domain are different problems with different timelines. Here's what each is, when you need it, and how to do it without burning your sender reputation.

A practical breakdown of EU data residency, GDPR processor requirements, and how the major transactional email APIs stack up against them.

Step-by-step guide to turning a customer-facing inbox into structured webhooks. Parse MIME, handle attachments, detect replies, and route by subject pattern.

Why forwarded email breaks SPF, what SRS (Sender Rewriting Scheme) does about it, and when you absolutely need to implement it.

DMARC aggregate reports arrive as compressed XML from dozens of receivers. Here's how to parse, aggregate, and act on them without opening a single ZIP by hand.

A concrete 2026 setup for email authentication — what Gmail and Yahoo now require, what's changed from 2024, and the DNS records you actually need.

What XRechnung is, what the German B2B e-invoicing mandate requires, and how to send and receive EN 16931-compliant invoices through a REST API.

Today we're launching Postscale - complete email infrastructure for developers. Send, receive, and protect.

Everything you need to know about getting your emails into the inbox, not the spam folder.

How masked email addresses protect user privacy and why every platform should offer them.