Yahoo sender rules
Yahoo publishes requirements for anyone who sends mail to Yahoo addresses. They started in February 2024. Like Google, Yahoo has basic rules for every sender and extra rules for bulk senders. Yahoo also lists many recommendations. Here is a plain summary of the requirements, and what happens if you don't meet them.
Last checked 10 November 2026
The rules in detail
Who the rules apply to
Effective 1 February 2024
The rules apply to mail sent to Yahoo domains. Yahoo's requirements page splits senders into two groups: all senders, and bulk senders. The page does not give a message count that makes you a bulk sender. If you send marketing or newsletters at volume, plan to meet the bulk sender rules.
Rules for all senders
Effective 1 February 2024
Authenticate your mail with SPF or DKIM at a minimum. Keep your spam rate below 0.3%. Have valid forward and reverse DNS records for your sending IPs. Follow RFC 5321 and RFC 5322.
Extra rules for bulk senders
Effective 1 February 2024
Use both SPF and DKIM. Publish a valid DMARC policy of at least p=none. DMARC must pass. Yahoo strongly recommends a rua tag so you get reports. The domain in the From: header must align with the SPF domain or the DKIM domain. Relaxed alignment is fine. Use a working list-unsubscribe header with one-click unsubscribe for marketing and subscribed messages. Yahoo highly recommends the POST method (RFC 8058). The mailto method is accepted. Show a clear unsubscribe link in the body. It may lead to a preference page. Honour unsubscribes within 2 days. Keep your spam rate below 0.3%. Yahoo counts it based on mail delivered to the inbox. Yahoo also recommends DKIM keys of at least 1024 bits, ARC if you forward mail, and joining its Complaint Feedback Loop to track complaints.
Effective dates and enforcement
Effective 1 February 2024
Yahoo began enforcing these rules in February 2024. It rolled out enforcement gradually through the first half of 2024. Yahoo says the rules may change and asks senders to watch its page and blog.
What happens if you don't comply
Effective 1 February 2024
Yahoo says mail that does not meet the rules may see a negative impact on delivery at Yahoo domains. That can mean the spam folder or rejected mail. Yahoo lists its error codes on its sender site, so check the exact reply your server gets.
Checklist
Effective 1 February 2024
Check that SPF and DKIM pass for your sending domain. Publish a DMARC record with at least p=none and a rua address for reports. Check that your From: domain aligns with SPF or DKIM. Make sure each sending IP has valid forward and reverse DNS. Add one-click unsubscribe headers and a visible unsubscribe link to marketing mail. Remove people who unsubscribe within 2 days. Join the Complaint Feedback Loop and keep your spam rate below 0.3%.
Questions
Does Yahoo accept a mailto unsubscribe?
Yes. Yahoo says the mailto method is acceptable, but it highly recommends the one-click POST method from RFC 8058.
Is DMARC p=none enough for Yahoo?
For the requirement, yes. Bulk senders need a valid DMARC policy of at least p=none, and DMARC must pass.
How is Yahoo's spam rate counted?
Yahoo counts it based on mail delivered to the inbox. Keep this in mind when you compare it with your own numbers.
Sources
These are Yahoo's own pages. If they differ from our summary, the provider's page is right.
This is our summary, not the provider's official text. Rules can change; always check the linked source.
How we keep this up to date
We read each provider's own public pages and write a plain summary. Every rule links to its source, and each page shows the date we last checked it. When a provider changes a rule, we update the page and add an entry to the changes log.
Last updated 10.11.2026 19:01 IL (10.11.2026 17:01 UTC)