About this email (optional, makes the check smarter)
Tell the checker who it is for and what you want, and it also checks whether the email fits.
The score runs in your browser; nothing you paste is sent or stored. It uses fixed rules, not AI (see what it can and cannot judge below), and it does not test inbox placement: check your domain setup with the email DNS checker too.
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How the score works
The score is out of 100, split across five areas: deliverability (25 points: spam words, links, shouting), clarity (15: subject, length, readability, opening line), relevance and value (25: a reason to write to them, a benefit for them, one clear audience), tone and professionalism (20) and the call to action (15). Insults, negative claims about the prospect, clickbait subjects, "please buy" pitches or several basic writing slips are red flags: they cap the score at 35, because no amount of good formatting makes up for them.
If you fill in who the email is for, what you sell and what you want, the checker also tests the fit: does the email talk about the recipient's world, does it say what you offer, and does the ask match the goal (a concrete meeting ask, or a reference to the earlier email for a follow-up).
What the checker looks at
| Check | Why it matters | Rule of thumb |
|---|---|---|
| Subject length | Short subjects look like a note from a person, not a campaign | 2-6 words, no clickbait |
| Body length | Most first emails are read on a phone in seconds | Under about 100-125 words for a first touch |
| Readability | Busy buyers skim; long sentences lose them | Short sentences, everyday words |
| Links | Links and tracking in a first email are a common spam signal | None or one |
| Spam-trigger words | Hype words look like marketing and can hurt placement | Plain, specific language |
| Call to action | One easy question gets more replies than several asks | One low-effort question |
| Personalisation | Specific relevance is the main reason anyone replies | Something true about them, not just their first name |
| Tone | Insults, put-downs or negative claims about the prospect get you reported as spam | Respectful, neutral observations only (red flag: score capped at 35) |
| Sender-first pitch | "Please buy" asks for a sale before there is any interest | Start a conversation, not a transaction (red flag: score capped at 35) |
| Value for the reader | People reply when they see a problem solved or a result for someone like them | Name the problem or the result |
| Professional basics | Lower-case sentences, "hii", "u", typos look careless or automated | Capitalised, proofread sentences |
| Clickbait subject | "I dare you to open this" or a fake "Re:" feels like a trick | Say plainly what the email is about (red flag) |
| Fit with your recipient | An email about hospitals sent to a SaaS sales leader looks copy-pasted | One audience, one problem, their words |
| Opening line | The first line is the preview they see before opening | Skip "I hope you are well" and "My name is" |
What the checker can and cannot judge
It can catch what is visible in the text: length, readability, links, spam-trigger words, shouting, a missing or weak question, no reason for writing, insulting or hostile language, negative claims about the prospect, pushy "please buy" pitches, sloppy basics, and whether you talk about them or about yourself.
It cannot check whether what you say is true, whether your offer really suits this buyer, whether your personalisation is accurate, or how your sending domain is set up. It uses fixed rules, not AI, so a clever but wrong email can still score well. Treat the score as a checklist before a human read, not as a verdict.
For judgement, use the AI second opinion. After the score, one click opens ChatGPT or Claude (or copies a prompt for any AI assistant) with your email, your context and the checker's findings, and asks for a 0-10 review of relevance, clarity, credibility, tone and the ask, plus a rewrite under 100 words that keeps every fact true. It uses your own AI account, so it costs you nothing extra; your email is sent to that service only when you click.
After you have a good score
A clean email still needs a clean sending setup. Check SPF, DKIM and DMARC with the email DNS checker, work out your inbox and domain needs with the infrastructure calculator, and borrow proven structures from our cold email guides.
Frequently asked questions
Does a high score guarantee my email reaches the inbox?
No. Inbox placement depends mostly on your sending domain, authentication, volume and how recipients react. The score checks the email itself, so use it together with a correct SPF, DKIM and DMARC setup and sensible sending volumes.
How long should a cold email be?
For a first email, most outbound teams keep it short enough to read on a phone in a few seconds, roughly under 100-125 words. Follow-ups can be even shorter.
Should I put a link in a cold email?
In the first email, usually not. Links and tracking are a common spam signal and do not help someone decide to reply. Save links for later steps or for after they answer.
What counts as a spam-trigger word?
Hype and sales language such as "guaranteed", "act now" or "100% free". No single word gets you blocked, but several together make an email look like marketing. The checker lists the ones it finds so you can rephrase them.
Is my email stored when I use the checker?
No. The score runs entirely in your browser and nothing you paste is sent to B2BXclusive. Your email only leaves your browser if you click the AI second opinion buttons, and then it goes to the AI service you chose.
Why did my email get capped at 35?
It has a red flag: insulting or hostile words, a negative claim about the prospect, a clickbait subject, a "please buy" pitch, or several basic writing slips. Fix the red items and the cap lifts.
How does the AI second opinion work?
The checker writes a review prompt with your email, who it is for, what you sell, your goal and what the rules found. You open it in ChatGPT or Claude, or copy it into any AI assistant, and get scores, the reasons a buyer might delete it and a rewrite. It is told not to invent facts.