Sending email? Know what the spam folder will flag before you hit send.
Paste your subject and body. Get a severity-ranked pre-check against published placement factors and CAN-SPAM text rules — before a campaign burns your sender reputation.
No credit card required · Cancel anytime
Key Takeaways
- Email text vs published placement factors, severity-ranked.
- Actionable fix checklist — never a silent rewrite or auto-send.
- Honesty: a heuristic pre-check — not a delivery guarantee.
Email text first. Placement factors next.
Decision-support spam-risk ranks — not a delivery guarantee and not a legal audit.
InboxPrecheck — definition
InboxPrecheck pre-checks email copy — subject line and body — against the spam-placement and CAN-SPAM text factors that Gmail, Outlook and bulk-sender guidelines document, returning a scored, severity-ranked report with concrete edits before a campaign burns sender reputation in the spam folder.
What this is NOT
- Not a sending service, mailbox connector, or delivery guarantee.
- Not a DNS checker — SPF/DKIM/DMARC are advisory checklist items, never measured.
- Not a substitute for legal review of CAN-SPAM, CASL or GDPR obligations.
Controller / Processor — When packs mention privacy roles, we use GDPR Art.4 labels: Controller and Processor (decision-support only).
Email written. Spam folder won.
Spam-trigger phrasing
"Act now!!!" and "Free gift" are still the most reproducible phrases filters weigh — in subject lines hardest.
Structural gaps
No unsubscribe reference, no postal address, or a deceptive "Re:" subject are both CAN-SPAM exposure and placement poison.
Risky claims
Income and health promises in cold or bulk mail draw spam placement and FTC-level substantiation scrutiny.
Reputation damage
One badly-filtered campaign can drag a domain’s placement down for months — the tuition is paid in silence, with no bounce notice.
Paste. Scan. Fix.
Severity-ranked findings from your email text against published placement factors.
Spam-risk findings
Phrasing, format, CAN-SPAM gaps, claims and context advisories, each with quoted evidence.
Severity ranks
High / medium / low so you fix the send-blocking flags first.
Fix checklist
Actionable edits — you still own the final message.
Copy-ready report
Markdown you can paste into a ticket or campaign thread.
Everything you need for an email pre-check
Built for teams shipping new campaigns every week.
Spam-phrasing and format detection
Phrasing, format, CAN-SPAM gaps, claims and context advisories, each with quoted evidence.
Severity-ranked output
High / medium / low so you fix the send-blocking flags first.
Fix checklist included
Actionable edits — you still own the final message.
Copy-ready
Markdown you can paste into a ticket or campaign thread.
From paste to pre-check report in 3 steps
Paste the email
Subject line first, then body — plus send type and recipient scale.
Scan
Deterministic engine ranks findings by severity.
Review
You edit the message. InboxPrecheck never rewrites or sends.
Paste. Scan. Fix.
Severity-ranked findings from your email text against published placement factors.
Spam-trigger phrasing
"Act now!!!" and "Free gift" are still the most reproducible phrases filters weigh — in subject lines hardest.
Spam-risk findings — Phrasing, format, CAN-SPAM gaps, claims and context advisories, each with quoted evidence.
Placement factors · optional AI · human review
Paste your email text with send type and list size. Deterministic severity ranks first. Optional AI never invents findings. You review before sending.
Read the methodology →Paste-first email reports — not an ESP
| # | InboxPrecheck | Manual sender-guideline reading / spam-word lists |
|---|---|---|
| 1 | Text vs placement factors in one paste | Hours reading sender-guideline pages |
| 2 | Severity-ranked fix list | Scattered checklist notes or a silent spam-foldering |
| 3 | Self-serve from $19/mo | Enterprise deliverability suites |
| 4 | Decision-support only | May over-promise inbox-placement scores |
Methodology before you ship
AI draft · human review · decision-support only.
Read methodology →Open studioTry it on this page
or generate below.
Saved history
Built for newsletter operators and cold-outreach senders
Capability cards describe the studio. No fabricated customer counts.
A pasted email becomes ranked findings against published placement factors.
Send type and list size tune how aggressively risks escalate.
Every finding ships a suggested edit — you still decide.
Simple plans that scale
All paid plans include
- Deliverability pre-check studio
- Severity-ranked export
- Rule-based checks (decision-support)
- Email support on paid plans — no hidden add-ons for core studio use
- Limited AI checks: 3/day · 15/mo (fair use)
- Studio demo (no extra LLM fee)
- AI included: 40 runs/day · 300/mo (fair use)
- No separate ChatGPT subscription required
- Priority support · 2 months free with yearly
Feature comparison
What each plan includes — quotas reflect the enforced fair use limits.
| Dimension | Free | Pro | Enterprise |
|---|---|---|---|
| Usage | |||
| AI runs | 3/day · 15/mo | 40/day · 300/mo | 200/day · 3,000/mo |
| Report export | Watermarked | Clean export | Clean export |
| Audit log | Not included | ✓ Included | ✓ Included |
| Product | |||
| Spam-trigger phrase detection with word-form matching | ✓ Included | ✓ Included | ✓ Included |
| Format risks: caps, punctuation hype, emoji, "click here", link density | ✓ Included | ✓ Included | ✓ Included |
| CAN-SPAM structural gaps: unsubscribe, postal address, deceptive subjects | ✓ Included | ✓ Included | ✓ Included |
| Outcome-claim sensitivity by send type and list size | ✓ Included | ✓ Included | ✓ Included |
| BYOK (your LLM key) | Not included | Not included | ✓ |
| SSO | Not included | Not included | Roadmap |
| Support & compliance | |||
| Support | Community | Priority | Custom SLA |
Already paid? Unlock Pro with your license
Licenses are issued manually after your payment is confirmed: we generate one per paid order and send it to the purchase email, typically within a few hours. Enter it below to activate Pro on this device — no account needed. Nothing yet? Write to lixingliangsy@163.com and reference your order email.
Your questions, answered
What does InboxPrecheck check?
A scored, severity-ranked pre-check of one pasted email (subject + body) against published placement factors and CAN-SPAM text requirements — decision-support drafts, never a delivery guarantee.
Does a good score guarantee my email reaches the inbox?
No. Placement depends on senders, ISPs, and recipients — your domain reputation, authentication records, consent and engagement are outside what any text checker can see. InboxPrecheck only flags the published factors present in the text you paste.
Can I cancel anytime?
Yes. Self-serve plans cancel anytime; access continues until period end.
Do I need a credit card to start?
No. Start with email signup or Demo mode in the studio, then upgrade when ready.
Do I need my own ChatGPT / OpenAI subscription?
No for Free/Pro. AI runs are included in your plan (fair use) via our platform key. Enterprise can optionally bring your own OpenAI key (BYOK) — configure it at /settings (key stays server-side only).
What is Fair Use / what if I hit the AI limit?
Free includes 3 AI checks/day and 15/month. Pro includes 40/day and 300/month. At the fair-use limit the studio returns a clear QUOTA_EXCEEDED notice with the reset time — the Rule-based demo keeps working; Enterprise BYOK covers heavier volume.
Is checkout secure?
Payments are processed by Waffo Pancake (merchant of record).
What happens after I pay?
You receive access confirmation; fulfillment is tracked via webhook + order logs.
Quick answers
- Ranked findings per run
- Placement-factor aware
- CAN-SPAM text gaps flagged
- Copy-ready
- Pricing starts at $0 (Free).
更多问题
What inputs?
Email text (subject on the first line, then body), send type, recipient scale, and strictness.
Delivery guarantee?
No. Heuristic pre-check — not a delivery guarantee and not legal advice.
What comes back?
Ranked findings with quoted evidence and a fix checklist — always review.
Demo or live?
Demo is labelled; live wording needs a configured AI key.
Who is it for?
Founders, newsletter operators and marketers sending cold outreach, promos or regular mailings.
Primary sources?
Your pasted email text and published placement-factor guidance (16 CFR 316, RFC 8058, Outlook sender practices).
Does it check SPF/DKIM/DMARC?
No — deliberately not. It never queries DNS or connects to sending accounts; authentication appears as advisory checklist items only.
Does it clean my mailing list?
No. Address validity is a different tool class; InboxPrecheck judges only the message text you paste.
How it compares
| Dimension | Manual | InboxPrecheck |
|---|---|---|
| Speed | Hours reading sender-guideline pages | Seconds per email draft |
| Consistency | Varies by reviewer memory | Same placement factors every run |
| Output | Free-form checklist notes | Structured pre-check report |
| Best for | Final sign-off | Pre-flight QA per campaign draft |
When not to use: Skip it when you need guaranteed placement, a lawyer’s opinion on CAN-SPAM/CASL, live SPF/DKIM/DMARC measurement, or list cleaning. This only pre-checks the email text you paste.
- Where emails pick up spam risk — The four places email text quietly trips placement factors.
- Email checks that people do not learn to ignore — What to block on, what to warn on, and what to leave alone.
- What an email pre-check cannot see — The honest boundary between risky copy and a damaged domain.
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