Gmail and Yahoo bulk sender requirements
Under the line.Until a launch day.
The bulk sender requirements start when you send close to 5,000 or more messages a day to personal Gmail accounts, or more than 5,000 a day to Outlook.com addresses. Yahoo says “a significant volume” and publishes no number. Below that you aren’t a bulk sender, but Gmail and Yahoo still ask every sender to pass SPF or DKIM and keep spam complaints under 0.3%. Google counts across your whole primary domain, and anyone who reaches the line even once stays a bulk sender. The checker below shows which rules you’re under, from your busiest day.
By the Builderify team
An example, made up for this page
Do the bulk sender requirements apply to you?
Bulk starts at the line.
The requirements come in three tiers, and only the first is for everyone. Every sender needs working authentication and a low spam rate. Bulk senders add a second set. Marketing mail from a bulk sender adds a third, which is where most senders slip.
One launch can move you up a tier in a day. Google counts your busiest day, across your whole primary domain, and never takes the label back, so the safe plan is to meet the second tier before the launch, not after.
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01
Every sender
Pass SPF or DKIM, and keep spam reports low.
Gmail and Yahoo ask this of everyone, at any volume: SPF or DKIM passing for your From domain, valid forward and reverse DNS on the sending server, and user-reported spam under 0.3%. Google’s target is under 0.10%.
Any volume
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02
Bulk senders
Both records, DMARC, and a From that lines up.
SPF and DKIM both, a DMARC record of at least p=none, and a From domain that lines up with SPF or DKIM (Google says one is enough). Gmail also requires TLS. Outlook.com asks for SPF, DKIM and an aligned DMARC from senders above 5,000 a day.
From about 5,000 a day
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03
Marketing mail
One-click unsubscribe, honoured in 2 days.
Bulk senders must add List-Unsubscribe headers (RFC 8058) to marketing and promotional mail and honour requests within 2 days. Google excludes transactional mail: password resets, reservation confirmations and form confirmations.
Bulk senders, marketing only
From Google’s sender guidelines and FAQ, Yahoo’s Sender Hub and Microsoft’s Outlook.com announcement, read on 1 November 2026. The side-by-side table, with the dates, is in the SPF, DKIM and DMARC guide.
Are you a bulk sender?
Enter your busiest day.
Enter the most email you send in one day and, if you know them, the shares going to Gmail and Outlook.com, and the checker shows where you stand and what to set up. Count every tool that sends as your domain, and use your biggest day, not an average one. It starts on a small shop; change anything. Nothing you type leaves your browser.
1,200 a day · Gmail share unknown · Outlook.com share unknown
Under the line today. The basics still apply.
Gmail and Yahoo ask every sender for SPF or DKIM and spam reports under 0.3%, at any volume. Plan for your biggest day: a launch can take you over, and Gmail never takes the label back.
- GmailUnder the line
At most 1,200 a day, whatever your mix: under the line.
Only the basics apply here today: SPF or DKIM, and spam reports under 0.3%.
If you miss it Rate-limited or blocked mail, or the spam folder, and no delivery help from Google.
- Outlook.comUnder the line
At most 1,200 a day, whatever your mix: under the line.
Below Microsoft’s line. Its filters still weigh authentication, so set up SPF and DKIM anyway.
If you miss it Mail rejected with 550 5.7.515, since 5 May 2025.
- YahooNo number
No published number.
Yahoo says “a significant volume of mail” and doesn’t define it. The safe reading is to treat yourself as bulk at Yahoo whenever you are, or are close to it, at Gmail or Outlook.com.
If you miss it Mail filtered or blocked, with no fixed error code.
What to set up, in order
- 1Make SPF or DKIM pass for the domain in your From address.
- 2Keep user-reported spam under 0.3%. Google asks for under 0.10%, and its Postmaster Tools shows your rate.
- 3Before a launch, set up the rest: both SPF and DKIM, DMARC at p=none, a matching From, and one-click unsubscribe on marketing mail.
How to do each: set up SPF, DKIM and DMARC.
A calculator, not a ruling
It applies the lines the providers publish to the numbers you give it. It can’t see your mail, your list or your DNS, and a provider can change a rule, so check their pages before you rely on a detail.
Plan for the peak
Use the biggest day you expect this year, not the average. A launch or one large newsletter is enough to cross a line, and Google says Gmail’s bulk label never expires.
Already seeing bounces?
If Gmail or Outlook.com is rejecting your mail, email bounce codes decodes the code, and reading the headers shows which of SPF, DKIM and DMARC is failing.
How is the 5,000 counted?
By domain, by day, for good.
Google counts every message from your primary domain to personal Gmail accounts within 24 hours, and anyone who reaches the line even once stays a bulk sender. Six details decide whether you’re over it. The first two surprise people most: a marketing subdomain doesn’t keep you under the line, and mail to Google Workspace addresses doesn’t count toward it.
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01
One primary domain
Google counts all messages sent from the same primary domain. Its own example: 2,500 a day from solarmora.com plus 2,500 from promotions.solarmora.com makes 5,000, so that sender is bulk. A marketing subdomain doesn’t keep you under the line.
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02
Personal accounts only
At Gmail only mail to personal accounts counts: Google says the requirements don’t apply to Google Workspace inbound or intra-domain messages. Outlook.com’s rule names outlook.com, hotmail.com and live.com addresses, so business addresses on Microsoft 365 don’t count toward it either.
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03
A 24-hour window
The test is the messages sent within 24 hours, so your busiest day decides, not your monthly average. One large newsletter or launch is enough to reach the line.
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04
Once bulk, always bulk
Google says senders who meet the criteria at least once are permanently considered bulk senders, and that changing how you send won’t remove the status.
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05
New domains get less time
Google calls a domain new if it hasn’t sent more than 5,000 emails a day to personal Gmail accounts since 1 January 2024, and enforces on an accelerated timetable for new domains.
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06
Everything counts, one rule bends
Google counts all messages from the domain. The one carve-out it lists is for one-click unsubscribe, which marketing and promotional mail needs and transactional mail doesn’t.
Counting rules from Google’s email sender guidelines FAQ; the Outlook.com line from Microsoft’s announcement, read on 1 November 2026.
How to count yours
Count by provider
Export your list and count the addresses ending in @gmail.com, and in @outlook.com, @hotmail.com or @live.com. Multiply each count by how many messages every address gets on your busiest day.
Add every sender together
Your newsletter tool, your shop’s order emails, a CRM and your own mailbox all send as your domain, and Google counts them together. Add up their busiest days.
Plan for the peak
Take the biggest day you expect this year, with the growth you want. Setting up the bulk requirements before it is cheap, and Google says the label never expires.
What happens if you
don’t meet them?
Two kinds of miss.
At Gmail, a miss either breaks delivery or costs you Google’s help. Authentication, DNS and TLS misses lead to temporary or permanent failures, or the spam folder. A missing DMARC record, a spam rate over 0.3% or marketing mail without one-click unsubscribe leaves you without delivery support.
Temporary or permanent failure, or the spam folder
- From and authentication don’t line up
- Not authenticated with both SPF and DKIM
- No valid forward and reverse DNS
- Not sent over TLS
- Not in RFC 5322 format
Google gives no delivery help
- A spam rate above 0.3%
- No DMARC record, minimum p=none
- Marketing mail without one-click unsubscribe
- Unsubscribe requests not honoured within 48 hours
Google says only bulk senders that meet every requirement can escalate a delivery problem, and that a spam rate above 0.3% keeps you ineligible until it has stayed below 0.3% for 7 days in a row. Its Postmaster Tools shows your spam rate and a compliance status.
Gmail
Temporary failures (4xx), blocks (5xx) or the spam folder. Enforcement ramped up from November 2025, and new domains are enforced faster.
Outlook.com
Mail from non-compliant high-volume domains is rejected with 550 5.7.515, since 5 May 2025.
Yahoo
Mail is filtered or blocked, with no fixed error code. Rolled out gradually since February 2024.
Got a code in a bounce? Email bounce codes decodes 550 5.7.26, 550 5.7.515 and the rest.
Builderify and the bulk rules:
checked before the first send.
Builderify can’t change the providers’ rules, but Broadcast handles the parts of them that sit in the sending tool. Broadcast and Sequences send from your own domain, and the Inbox catches what comes back.
Checked before the first send
Broadcast checks SPF, DKIM and DMARC on your domain before your first send. You add the records shown in your dashboard, wait for them to verify, then send.
One-click unsubscribe built in
Every send carries an unsubscribe link and supports one-click opt-out. Unsubscribed and bounced addresses are skipped on later sends.
A person approves each sender
Sending unlocks once your records resolve and a person has reviewed your sender. Campaigns go out from your own verified domain, with hourly limits per organization.
Problems come back to you
Replies, bounces, unsubscribes and abuse reports land in their own mailboxes in your Inbox, so complaints show while they are still few.
Pay per email, not per month.
One recipient on one broadcast or sequence email costs 0.5 credits. Every account gets 250 free credits a month, and there is no monthly fee. See the pricing page for the whole rate card.
250 free
credits every month, with no monthly fee
0.5 credits
per email sent, per recipient
From $9
for a one-time pack of credits that never expire
When it isn’t the right fit
It doesn’t change the rules for mail you send from your own Google Workspace, Microsoft 365 or host mailbox: those records are yours to set, and that mail counts toward the same domain total. It can’t read your Gmail spam rate either; Google’s Postmaster Tools does that. And no sender can promise the inbox. For what a marketing email must contain by law, see the CAN-SPAM checklist.
Fix the records first with the SPF, DKIM and DMARC guide, then send campaigns from a domain that has passed the check, and read what comes back in your Inbox.
Start freeBulk sender requirements, answered.
At Gmail it is close to 5,000 or more messages in 24 hours to personal Gmail accounts, counted across your whole primary domain; mail to Google Workspace accounts does not count. Outlook.com's rules apply above 5,000 a day to outlook.com, hotmail.com and live.com addresses. Yahoo says "a significant volume of mail" and publishes no number.
The bulk requirements do not, until you reach the line. Gmail and Yahoo still ask every sender to pass SPF or DKIM and keep spam complaints under 0.3%. Google says anyone who reaches the line even once is a bulk sender permanently, so set up the full list before a big launch rather than after.
Google says it counts all messages sent from the same primary domain, with no exception named for transactional mail. One-click unsubscribe is required only for marketing and promotional messages: password resets, reservation confirmations and form submission confirmations are excluded.
At Gmail, mail can be rate limited, rejected or sent to spam if authentication, DNS or TLS fails, and with no DMARC record, a spam rate above 0.3% or no one-click unsubscribe Google will not help with delivery problems. Outlook.com has rejected non-compliant mail with 550 5.7.515 since 5 May 2025, and Yahoo filters or blocks without a fixed code.
Broadcast checks SPF, DKIM and DMARC on your domain before your first send, sends from your own verified domain, supports one-click unsubscribe and skips unsubscribed and bounced addresses. A person reviews each new sender, and the records stay in your own DNS. It cannot promise inbox placement.
Sources
- Gmail Help Email sender guidelines
- Google Workspace Help Email sender guidelines FAQ
- Google Postmaster Tools
- Yahoo Sender Hub Sender requirements and recommendations
- Microsoft Tech Community Outlook’s new requirements for high-volume senders
- Microsoft Support Sender support in Outlook.com
- IETF RFC 8058: One-click unsubscribe for email
The provider pages were read on 1 November 2026. Gmail, Yahoo and Microsoft change what they ask of senders from time to time, so check their pages before you rely on a detail. The Builderify details come from the module pages, the rate card on this site and the product itself. The domain and the numbers in the picture are made up.
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