Runs in your browser; nothing you paste is sent or stored. The checks are rules of thumb used by outbound teams, not a guarantee of inbox placement: check your domain setup with the email DNS checker too.
Get your sending domains and inboxes set up for you
B2BX Infra sets up Google Workspace and Microsoft 365 inboxes on new domains with SPF, DKIM and DMARC already in place, ready to warm 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 |
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 checker runs entirely in your browser and nothing you paste is sent to B2BXclusive or anyone else.