Free compliance check against the Google and Yahoo bulk sender requirements in effect since February 2024. Instantly verify SPF, DKIM, DMARC, TLS, and one-click unsubscribe setup — before your mail starts landing in spam.
Scanning Google & Yahoo compliance…
Skysnag Platform
Skysnag keeps your SPF, DKIM, and DMARC aligned so you always pass Google & Yahoo's sender requirements — without manual upkeep or broken campaigns.
Skysnag Comply continuously validates your domain against Google, Yahoo, Microsoft, and Apple sender policies — catching drift before it hits your deliverability. Automated DMARC, SPF, and DKIM management with real-time alerts means you stay compliant as the rules evolve.
DMARC Enforcement
Automated policy uplift from p=none to p=reject with continuous monitoring
SPF Management
Authorised sender inventory and lookup-count optimisation to prevent PermError
DKIM Signing
Automated DKIM key rotation and selector management across all sending services
Unsubscribe Compliance
Verifies RFC 8058 List-Unsubscribe headers are present and correctly formatted
Spam Rate Monitoring
Google Postmaster Tools integration with alerts before you cross the 0.3% ceiling
Real-Time Alerts
Instant notification when any sender requirement falls out of compliance
In October 2023, Gmail and Yahoo announced a joint set of sender requirements that took effect in February 2024. The rules apply to every sender of marketing or transactional email to Gmail and Yahoo addresses, with stricter enforcement for bulk senders — defined as domains sending more than 5,000 messages per day to Gmail addresses. Missing any mandatory requirement leads to spam-folder placement, throttling, or outright rejection.
Every sender must publish valid SPF and DKIM records. Bulk senders must additionally publish DMARC with at least p=none, and align the From: domain with either SPF or DKIM. Misalignment causes immediate failure.
Bulk senders must include RFC 8058 List-Unsubscribe and List-Unsubscribe-Post headers. Unsubscribes must be honored within two days. Links buried in email bodies no longer satisfy the requirement.
All mail to Gmail and Yahoo must be transmitted over TLS. Cleartext SMTP or TLS downgrades will be rejected. Publishing MTA-STS and TLS-RPT is strongly recommended to prevent silent downgrades on the inbound path.
Google publishes a 0.3% spam rate ceiling in Postmaster Tools. Crossing it triggers filtering and throttling. Real-world target is under 0.1% — bulk senders above 0.3% see sudden, domain-wide deliverability collapse.
The domain in the From: header must match the SPF domain or the DKIM signing domain. Most deliverability regressions after February 2024 trace back to unaligned third-party senders like Salesforce, HubSpot, or Marketo.
If your mail is forwarded through mailing lists or shared inboxes, enable ARC signing so downstream mailbox providers can still verify the original authentication results. Without ARC, forwarded mail often fails DMARC at Gmail.
Everything you need to know about Google and Yahoo sender requirements.
Meet with one of our experts to review your report. We'll walk you through the issues, explain the security gaps, and show you exactly how Skysnag resolves them - automatically.
Discuss my resultsSkysnag gives you everything you need to enforce DMARC, automate SPF and DKIM, deploy MTA-STS and TLS-RPT, and activate BIMI - so your emails are secure, compliant, and trusted.
Monitor
Identify email compromise attempts and troubleshoot email delivery issues
Comply
Comply with Microsoft, Google and Yahoo requirements and visualize sending data in real-time
Protect
Automate DMARC enforcement for unparalleled email security
Certify
Certify your brand with the highest identity standard globally
