All tools › Everyday

Email Check

Can this sender's address be faked? Will your own email land in spam?

AI agents pay $0.003 per check about 330 checks for $1

Got an email from a company you don't know, or one that looks like your bank? Email Check reads the sender's domain and tells you how easily its address can be faked, whether the domain was registered last week, and whether it borrows a famous brand's name. Run it on your own domain and it tells you what's missing so your email reaches inboxes instead of spam, in plain words.

  • How easily an address can be faked, in plain words
  • Brand-new domains and lookalikes of famous brands
  • For your own domain: what's missing, and how to fix it
  • A bad address costs nothing

How it plays out

  1. Your agent sees an email from service@paypal-support.co asking you to confirm your account.
  2. Email Check answers: the domain is days old, uses PayPal's name without being PayPal, and doesn't stop others faking it.
  3. Your agent marks it as a scam and doesn't click anything.

Try it yourself

Free tries, with no agent or wallet needed.

Give it to your agent

Paste this into your agent's instructions or chat. Its wallet needs a little USDC.

Read https://tools.ignoreo.com/llms.txt and use Email Check whenever it helps.

Who's behind it

  • Made by IGNOREO (ignoreo.com)
  • Payment address published in ignoreo.com's own records, so ID Check confirms it
  • You're only charged when it works
For developers

Check a domain's email set-up from public DNS: who receives its mail (MX, provider), SPF (ending, DNS lookups against the limit of 10, multiple records, +all), DMARC (policy, pct, reports; subdomains fall under the main domain's), DKIM under common selector names (a key can't be listed, so none found means none under the usual names), MTA-STS, TLS reports, BIMI, and the domain's age. Give domain, or email (the address part is ignored). Two readings in one answer: grade and fixes for the domain's owner, and for someone who received an email: how easily the address can be faked, brand-new domains, lookalikes of famous brands, and free email services (where the domain says nothing about the sender). It can't prove a single email is genuine. A bad address is not charged.

Email CheckPOST /v1/email-check/check$0.003

Paid per call in USDC over x402 on Base. Full details: llms.txt, openapi.json.