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Bulk sender check for Gmail, Yahoo and Outlook

Check whether a domain meets the Gmail, Yahoo and Outlook rules for bulk senders: SPF, DKIM, DMARC, encryption and blocklists.

What bulk senders must meet

Gmail, Yahoo and Outlook.com set requirements for senders who send very many emails every day. Gmail names more than 5,000 emails per day to Gmail addresses for this (source: Google, checked on 1 November 2026), Outlook.com also 5,000. According to our sources Yahoo names no fixed limit. The check covers what can be read from the domain:

  • SPF, DKIM and DMARC are set up. DMARC is enough with p=none, enforcement is recommended.
  • The mail servers encrypt (STARTTLS), and the domain is on no blocklist.

Other points can only be checked with a real email or at the provider, for example one-click unsubscribe or the spam rate. They are listed as “manual” and do not count towards the rating. The providers' rules change, the sources are in the guide.

Learn more: Gmail, Yahoo and Outlook sender rules · Email test with a real email

FAQ

Who do the rules of Gmail and Yahoo apply to?

For senders who send very many emails every day. Gmail names more than 5,000 emails per day to Gmail addresses, Outlook.com also 5,000, Yahoo no fixed limit according to our sources. Many recipients also check smaller senders against the same rules.

Is DMARC with p=none enough?

A DMARC record is enough to meet the requirement, even with p=none. Enforcement with quarantine or reject is recommended once all real senders pass SPF or DKIM with a matching domain.

What does the check not cover?

We cannot see one-click unsubscribe, the alignment of a specific email and the spam rate from the domain. The first two are shown by the email test with a real email, the spam rate only by Google in the Postmaster Tools.