SPF Flattening — Managing Complex Email Infrastructure in 2025
SPF records have a 10 DNS lookup limit that many organisations now exceed — SPF flattening tools and dynamic SPF are the solutions keeping email deliverability intact in 2025.
Mailcow vs iRedMail vs Mail-in-a-Box — Which in 2024?
Comprehensive comparison of the top three self-hosted email platforms in 2024 — Mailcow, iRedMail and Mail-in-a-Box compared on features, ease of use and performance.
Yahoo and Gmail DMARC Enforcement — Full Impact Report 2024
Three months after Gmail and Yahoo began enforcing DMARC requirements for bulk senders — the full impact on email deliverability and what the data shows.
Google and Yahoo Enforce DMARC — What Every Server Admin Must Do
Google and Yahoo begin enforcing DMARC authentication for bulk senders in February 2024 — servers without proper SPF, DKIM and DMARC records will see emails rejected.
Mailcow 2023 — Major Security Update and New Features
Mailcow releases a critical security update in 2023 fixing authentication bypass vulnerabilities — all self-hosted Mailcow installations must update immediately.
Postfix 3.8 Released — Improved TLS and Performance
Postfix 3.8 brings TLS fingerprint verification, improved postscreen performance and better handling of large mail queues — a significant update for mail server administrators.
Microsoft Exchange ProxyNotShell Zero-Day — Critical Alert for Admins
Two critical zero-day vulnerabilities in Microsoft Exchange Server allow unauthenticated remote code execution — all Exchange administrators must apply mitigations immediately.
ProtonMail Opens Source Code — Privacy Email Revolution
ProtonMail open-sources its iOS, Android and web clients — a major milestone for privacy-focused email that validates end-to-end encryption claims independently.
Google Workspace Price Increase — Self-Hosted Email Alternatives
Google Workspace doubles prices in 2022 — businesses evaluate self-hosted alternatives like Mailcow, iRedMail and Zoho Mail to reduce email hosting costs.