Gmail strengthens its rules: what changes for your newsletters and email marketing

Nov 4, 2025

Google continues its commitment to a safer Internet.
Starting in November 2025, Gmail will tighten its filtering rules for messages sent to @gmail.com addresses. The goal: better protect users and ensure senders meet authentication standards.

New GMail rules

Less spam, more transparency

Until now, non-compliant messages (SPF, DKIM, DMARC, TLS…) were often silently placed in spam without feedback.
From 2025, Gmail will reject them directly at the SMTP level, returning clear error codes such as:

  • 4.7.27 → SPF failed

  • 4.7.30 → DKIM failed

  • 4.7.31 → Missing DMARC

  • 4.7.32 → Domain alignment issue

  • and other 5.7.xx codes for permanent rejections

👉 Official Gmail documentation

A positive step for senders and recipients

This change benefits everyone:

  • Gmail users will receive less spam.

  • Legitimate senders gain better transparency, as each rejection includes a specific reason.

No more undetectable “silent spams”.

How Mindbaz anticipates these changes

At Mindbaz, we’ve already implemented these standards:

  • Most clients delegate their DNS zone, allowing us to manage SPF, DKIM, and DMARC directly.

  • For those managing their own DNS, we automatically check records before any sending to prevent delivery issues.

This ensures your newsletters and email marketing messages are authenticated and delivered reliably.

In summary:

This evolution follows the Yahoogle update introduced in 2024 by Yahoo and Google, which already imposed stricter rules on bulk senders.
It represents another key step in the global fight against spam.
With Mindbaz, your messages are already compliant: authenticated, secure, and transparent.