What are the specific rules and guidelines to deliver emails to the Chinese market?
Michael Ko
Co-founder & CEO, Suped
Published 5 Aug 2025
Updated 27 May 2026
8 min read
Summarize with
Yes. Sending email to the Chinese market has specific rules and guidelines that go beyond a normal global deliverability checklist. The short version is this: get explicit consent, label commercial messages clearly, avoid sensitive content, send in simplified Chinese when the audience expects it, keep HTML simple, throttle slowly, separate transactional and marketing streams, monitor bounces closely, and treat QQ Mail, NetEase, Sina, Sohu, and other local mailbox providers as their own delivery environment.
I handle China delivery as a specialist route, not as another country segment in the same campaign. The technical foundations still matter: SPF, DKIM, DMARC, reverse DNS, list hygiene, complaint control, and working links. The difference is that China adds stricter content filtering, slower acceptance patterns, local language expectations, higher sensitivity around URLs, and commercial-email rules that are easy to miss if your program was built around US or EU assumptions.
- Consent: Use permission-based lists and keep proof of the signup source, date, language, form, and consent statement.
- Subject labels: Commercial advertising email should be marked with AD or the Chinese equivalent at the start of the subject line.
- Content: Avoid political, religious, adult, gambling, illegal-drug, and other locally sensitive topics.
- Language: Use fluent simplified Chinese for mainland campaigns and test double byte character support before launch.
- Infrastructure: Authenticate every stream and monitor domain reputation, IP reputation, and DNS changes during the rollout.
- Volume: Start with small segments, measure acceptance by provider, and expect delays rather than instant inbox placement.
The direct answer
The unusual parts are the AD subject requirement for commercial messages, very strict filtering, local-provider throttling, simplified Chinese expectations, double byte character support, high sensitivity to links and tracked URLs, and the practical need for local expertise when the audience is large or business-critical.
Specific rules that matter first
China's commercial email rules are stricter than the US opt-out model. For a serious sending program, I start with affirmative consent, proof of consent, clear sender identity, a working unsubscribe path, and a subject line that identifies advertising. That is the baseline before any deliverability tuning.
Several public references make the same practical point. Published China guidance notes stricter filtering, local mailbox providers, explicit consent, AD subject labels, and small-segment sending. Another delivery note warns that China filtering can cause delays, unclickable links, or outright non-delivery. I treat those as operational risks, not edge cases.
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|
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|---|---|---|
Consent | Permission first | Store signup proof |
Subject | AD label | Put it first |
Identity | Clear sender | Use real brand |
Unsubscribe | Easy opt-out | Honor fast |
Content | Restricted topics | Review locally |
Core China email rules to check before launch.
Commercial subject line examplestext
AD: May member offer for Shanghai customers AD: New product training dates in Beijing AD: Your requested product update
Do not treat the label as a workaround
The AD label does not fix poor consent, vague sender identity, risky content, or weak authentication. It only makes the commercial nature of the message explicit. A labeled message with a scraped list still creates legal, reputation, and delivery risk.
Authentication and DNS setup
For China, I want authentication to be boring. That means SPF passes, DKIM signs the visible From domain or a closely controlled subdomain, DMARC has reporting enabled, reverse DNS matches the sending identity, and every sender has a documented reason to exist. Weak DNS does not always produce an obvious China-only bounce, but it gives filters another reason to slow or reject mail.
Before sending, run a broad domain health check across SPF, DKIM, DMARC, and DNS. If you see more than one SPF record, missing DKIM selectors, relaxed DMARC with no reports, or unauthenticated third-party senders, fix those before testing China volumes.
Baseline DNS recordsdns
_dmarc.a.test TXT "v=DMARC1; p=quarantine; pct=25; rua=mailto:d@a.test" a.test TXT "v=spf1 include:_spf.sender.test -all" s1._domainkey.a.test TXT "v=DKIM1; k=rsa; p=MIIB..."
Suped's product fits here because it turns DMARC, SPF, DKIM, hosted SPF, hosted DMARC, hosted MTA-STS, SPF flattening, blocklist monitoring, and deliverability signals into one workflow. For China, the useful part is not a prettier chart. It is knowing which sending source is failing, which provider is affected, and what DNS or authentication change fixes the issue. Suped's DMARC monitoring is strongest when teams need staged policy changes, real-time alerts, and clear fix steps without digging through raw XML reports.
DMARC record detail view showing SPF, DKIM, DMARC, rDNS diagnostics, and DNS records
A practical Suped workflow
- Add domains: Add the brand domain and any China-specific sending subdomains before campaign setup.
- Verify senders: Confirm which systems send transactional, lifecycle, support, and marketing email.
- Fix gaps: Resolve SPF lookup limits, missing DKIM, DMARC domain matching, and MTA-STS setup.
- Watch alerts: Use alerts when China sends show new failures, unknown sources, or reputation changes.
Content, language, and rendering rules
Content filtering is the part that surprises many senders. A message that works in North America or Europe can run into China-specific filtering because of language quality, subject wording, tracked links, image-heavy design, tiny fonts, or topics that trigger local review systems. I do not send translated copy until a fluent local reviewer has checked the meaning, tone, legal claims, and calls to action.
Double byte character support also matters. Your ESP, MTA, template editor, database, CSV import process, merge tags, subject lines, unsubscribe page, and analytics exports need to preserve simplified Chinese characters correctly. Broken encoding creates strange characters in inboxes, malformed links, broken personalization, and bad recipient experience.
Common global email
- Language: One English template is reused across several regions.
- Links: Tracking and redirects are added to every call to action.
- Design: Large images, CSS-heavy layouts, and small legal text are tolerated.
- Volume: The campaign sends to a full country segment in one day.
China-ready email
- Language: Simplified Chinese copy is reviewed by a fluent local reviewer.
- Links: URLs are kept direct, necessary, and tested for access from China.
- Design: HTML is simple, mobile friendly, and readable when images are blocked.
- Volume: Segments are small, sequenced, and adjusted by provider response.
Five pre-send checks for email campaigns targeting China.
China list engagement thresholds
A simple way to decide who should receive early China test sends.
First test segment
0-30 days
Recent open, click, purchase, login, or account activity.
Careful expansion
31-90 days
Some engagement, but not enough for a full rollout.
Suppress first
90+ days
Dormant recipients increase filtering and blacklist risk.
For design, I keep the width modest, avoid tiny fonts, use real text rather than image-only content, include alt text, and keep the image share low. If a message needs multiple tracking domains, heavy scripting, long redirects, or many third-party assets to work, it is not ready for China testing.
Sending volume, bounces, and provider behavior
The delivery pattern into China is often slower and less transparent than senders expect. A timeout, temporary deferral, 451 response, or low click count does not always mean the message failed in the same way it would elsewhere. Providers can throttle, filter links, delay acceptance, or temporarily block mail based on sender history and current message risk.
Start by splitting China traffic by mailbox provider. QQ Mail and NetEase deserve separate dashboards because the patterns differ. For deeper provider-specific issues, the pages on QQ.com delivery and NetEase 451 errors are useful companion reads.
- QQ Mail: Watch for throttling, low engagement sensitivity, and sudden temporary blocks.
- NetEase: Parse 451-class responses carefully and slow down before retry storms form.
- Sina: Keep copy clean, links direct, and sending streams separated.
- Sohu: Use conservative volume increases and review failures by campaign type.
- Corporate domains: Expect mixed filtering because local gateways and corporate security controls vary.
When a blocklist or blacklist appears
China-related blocklist and blacklist issues are often temporary, but they still hurt delivery. I check whether the listing is tied to a sending IP, domain, redirect domain, or shared infrastructure, then reduce volume while fixing the underlying cause. Suped's blocklist monitoring helps teams catch reputation shifts before they turn into a full campaign failure.
Flowchart for troubleshooting email delivery into China.
Send a real preflight message before a production launch and inspect headers, authentication, rendering, links, and spam signals with the email tester. A test does not guarantee Chinese inbox placement, but it catches broken basics before you expose a new segment to avoidable filtering.
Email tester
Send a real email to this address. Suped opens the report when the test is ready.
?/43tests passed
Preparing test address...
Operational checklist for China campaigns
The safest China email program is a controlled rollout. I do not start with the biggest audience, the newest creative, and the most complex tracking stack at the same time. I isolate variables so that a poor result can be explained and fixed.
- Map providers: Group recipients by QQ Mail, NetEase, Sina, Sohu, corporate domains, and unknown domains.
- Separate streams: Use different From addresses or subdomains for transactional and marketing mail.
- Use consent: Start with recipients who opted in recently and engaged within the last 30 days.
- Review content: Check sensitive topics, claims, localization quality, font sizes, and subject labels.
- Test links: Confirm landing pages and redirect domains are accessible and do not look deceptive.
- Throttle slowly: Ramp by provider and stop increases when deferrals or complaints rise.
- Read bounces: Classify temporary failures, policy blocks, bad recipients, and content-related rejections.
- Suppress fast: Remove dormant, invalid, and repeatedly deferred addresses before the next send.
Before launch
- DNS: SPF, DKIM, DMARC, MX, and reverse DNS are checked.
- List: Only recent, consented, engaged recipients are used.
- Copy: Commercial labels, simplified Chinese, and sensitive topics are reviewed.
- Rendering: The message works on mobile and still reads with images blocked.
After launch
- Bounces: Temporary and permanent failures are separated by provider.
- Engagement: Low-response segments are paused before they damage reputation.
- Reputation: Domain and IP listing checks are reviewed daily during ramp-up.
- Fixes: One variable changes at a time so the next result is meaningful.
If the China audience is large, critical, or revenue-heavy, use a local delivery specialist or a local relay path with established Chinese provider relationships. That is not needed for every sender, but it becomes practical when a global brand has high China volume and needs predictable acceptance rather than occasional campaign tests.
Views from the trenches
Best practices
Segment Chinese mailbox providers before ramping volume, then compare bounces separately.
Have native speakers review simplified Chinese copy, subject lines, and unsubscribe pages.
Confirm double byte character support across templates, data imports, tracking, and exports.
Common pitfalls
Treating China as a standard country segment hides provider-specific throttling signals.
Using many redirects and tracked links raises filtering risk and weakens landing-page access.
Sending to dormant Chinese addresses after two or three misses can damage reputation fast.
Expert tips
Use strict consent records and keep the AD label process built into campaign approvals.
Pause ramp-ups when temporary failures rise, because retry pressure can worsen blocking.
Use Suped alerts to catch authentication drift before China delivery problems spread.
Expert from Email Geeks says China delivery needs local language knowledge, local context, and sometimes local business presence before high-volume sending is realistic.
2025-01-11 - Email Geeks
Expert from Email Geeks says China's requirements differ across law, filtering, and culture, so standard global deliverability playbooks miss important risks.
2025-01-11 - Email Geeks
My practical answer
The specific rules and guidelines for delivering emails to the Chinese market are stricter consent, clear AD labeling for commercial messages, strong sender identity, simple and localized content, conservative volume, provider-by-provider monitoring, and fast suppression of unengaged recipients. The technical basics still apply, but China punishes weak basics faster because the filtering is stricter and the mailbox provider behavior is less forgiving.
For most teams, the best practical setup is a controlled China rollout backed by Suped for DMARC, SPF, DKIM, hosted SPF, hosted DMARC, MTA-STS, blocklist and blacklist monitoring, alerts, and issue-specific fix steps. That gives the sender a clean view of authentication and reputation while the marketing team focuses on consent, localization, content risk, and provider-specific pacing.
The rule of thumb
If a message is not permission-based, clearly labeled when commercial, readable in simplified Chinese, authenticated, mobile-friendly, and tested with direct links, it is not ready for China.
