Google warns: Sender requirements enforcement ramping up
As of November 3, 2025, Google has added a new warning to their Bulk Sender Guidelines FAQ page, warning that enforcement "ramps up" beginning this month.
The warning: "Starting November 2025, Gmail is ramping up its enforcement on non-compliant traffic. Messages that fail to meet the email sender requirements will experience disruptions, including temporary and permanent rejections."
The email sending requirements necessary to stay in Gmail's good graces (and inbox) remain the same as previously announced: Authenticate, align, offer easy unsub, keep low complaints, ensure RFC compliance, etc. Nothing new there. But what's new is this level of enforcement: Non-compliant senders are more than ever before likely to find mail deferred (4xx) and rejected (5xx). The implication: enforcement was much more piecemeal and selective in the past, but no more.
If you're already a great email sender, fully compliant, and already doing everything right, nothing should change. But if you're not sure, or haven't confirmed (and maybe, even if you have), now's a good time to double-check everything. And be ready to monitor going forward. Google providing auth/RFC/compliance SMTP response info in DMARC reporting is very likely to be useful here.
As of November 3, 2025, Google has added a new warning to their Bulk Sender Guidelines FAQ page, warning that enforcement "ramps up" beginning this month.
The warning: "Starting November 2025, Gmail is ramping up its enforcement on non-compliant traffic. Messages that fail to meet the email sender requirements will experience disruptions, including temporary and permanent rejections."
The email sending requirements necessary to stay in Gmail's good graces (and inbox) remain the same as previously announced: Authenticate, align, offer easy unsub, keep low complaints, ensure RFC compliance, etc. Nothing new there. But what's new is this level of enforcement: Non-compliant senders are more than ever before likely to find mail deferred (4xx) and rejected (5xx). The implication: enforcement was much more piecemeal and selective in the past, but no more.
If you're already a great email sender, fully compliant, and already doing everything right, nothing should change. But if you're not sure, or haven't confirmed (and maybe, even if you have), now's a good time to double-check everything. And be ready to monitor going forward. Google providing auth/RFC/compliance SMTP response info in DMARC reporting is very likely to be useful here.
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