Send bulk mail without DMARC and it no longer arrives.
Google & Yahoo bulk sender requirements — anyone sending more than 5,000 messages a day to gmail or yahoo addresses.
messages a day to Gmail or Yahoo makes you a bulk sender — permanently.
01
What the rules require
In February 2024, Google and Yahoo began enforcing a shared set of requirements for bulk senders — defined as anyone sending more than 5,000 messages in a single day to their users. Cross that line even once and the classification sticks.
The core requirement is email authentication: publish a DMARC record of at least p=none, aligned with SPF, DKIM, or both, send from a valid From domain, and keep spam complaints low with a working one-click unsubscribe. SPF and DKIM alone are no longer sufficient — a published, aligned DMARC record is the floor.
02
The deadline already passed
Enforcement rolled out in stages. From February 2024, non-compliant mail received temporary errors (421 deferrals) on a small share of traffic. From April 2024, Google began rejecting a growing percentage outright. As of November 2025, non-compliant bulk mail receives permanent rejections (550 errors) — it is bounced, not delivered.
This is not a deliverability nuance that costs you a few opens. It is a policy block at the gateway. Marketing, transactional, and password-reset mail all hit the same wall if the domain they are sent from is not authenticated.
03
Where monitoring stops short
Google and Yahoo set the floor at p=none — published and aligned, but not yet enforcing. Meeting the floor gets your mail delivered; it does not stop someone spoofing your domain. p=none is the on-ramp, not the destination. Once you are authenticated and aligned for the mailbox providers, advancing to p=quarantine and then p=reject is the step that actually protects your domain — and it is the step Authex runs for you.
04
Common questions
Do Google and Yahoo require DMARC enforcement (p=reject)?
No. The bulk-sender floor is a published DMARC record at p=none, aligned with SPF or DKIM. That is enough to deliver. But p=none does not block spoofing of your domain — it only enables reporting. Enforcement (p=quarantine or p=reject) is the recommended and natural next step, and it is what actually protects you.
What counts as a bulk sender?
Sending more than 5,000 messages to Gmail addresses (or Yahoo addresses) in a single day. The classification is sticky — reaching the threshold once is enough to be treated as a bulk sender going forward.
What happens if I don't comply?
As of November 2025, non-compliant bulk mail to Gmail and Yahoo receives permanent rejections (550 errors). The mail is bounced at the gateway, not filtered to spam — so transactional and password-reset messages fail too, not just marketing.
Meet the requirement — and actually be protected.
Scan your domain to see where it stands today, then let Authex take it to enforcement and keep it there.