What we are tracking
This is the EmailUX monthly digest of email deliverability news. We round up the rule changes, postmaster announcements, and spec updates that actually affect senders — and skip the headlines that do not.
This month's headlines
- Google bulk-sender enforcement extended. Coverage now includes high-complaint senders below the 5,000-per-day threshold. See the full breakdown in the 2025 bulk-sender update.
- Yahoo authentication tightening. Mail failing alignment is now quarantined more aggressively. The authentication guide covers the fix.
- BIMI adoption growing. A handful of major retailers turned on BIMI with VMC certificates; inbox CTR lifts of 2-5% reported.
- Microsoft alignment with Gmail/Yahoo. Outlook.com phased rollout continues through 2026.
What to do this month
- Pull last month's Gmail Postmaster Tools spam-rate chart. Any single day over 0.2% deserves a write-up.
- Audit DMARC
ruareports for unexpected source IPs. - If you launched a new sending stream, check that you warmed the new sub-domain — see the domain warming guide.
- Review your bounce suppression list. Anything that hard-bounced should be in there.
Why a monthly digest?
Email deliverability changes are often cumulative rather than cliff-edge. A single Postmaster blog post rarely matters in isolation; the trend across three months always does. We publish this digest the first week of every month so teams running their own deliverability operation have a single place to catch up.
EmailUX itself does not enforce these rules — it is the design studio and trigger API on top of the ESP you already use (SendGrid, Workspace, SMTP, IMAP). This roundup is editorial, intended to keep teams running their own deliverability stack on top of their ESP informed about what changed and what to check for.
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