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As of 13 August 2026, AI can only partly verify business email addresses.
This still needs a person who signs their name to it.
Can you do it?
5 minutesto a draft.
30 minutesto something you’d act on.
Cost, all in£0
Skill neededchat-fluent
Who has to check ityou
What the alternative costsApollo.io is a purpose-built alternative with prospect data, AI enrichment and outreach workflows; no price is stated in the supplied tool data.
If this goes wrong: you send to invalid or unwanted addresses, waste outreach and may damage your sending reputation.
What to actually do
Hand it to a person
The route this page recommends
A person who owns the outcome does this end to end, worth it when the failure is dear.
Use a tool built for this
Second choiceDo it yourself
The distant thirdA chat interface, chat-fluent skill, and roughly 30 minutes until you can act on the result.
How to actually do it
- Export the addresses from your CRM or spreadsheet into a separate working copy, keeping the original address and any company or account context.
- Remove addresses you do not have a legitimate reason to contact, and avoid pasting unnecessary personal information into the chatbot.
- Paste the working list and context into the prompt, then ask the model to return the results as a table or CSV-ready list.
- Check the model's format flags against the original addresses, your CRM records and the companies' current websites.
- Run addresses marked as needing external verification through a dedicated email verification or enrichment workflow such as Apollo, where available, and record the provider result separately from the AI assessment.
- Keep only addresses with a clear verification result and an appropriate outreach basis, then import that checked list into your sales workflow.
Prompt
Assess this list of business email addresses for outreach preparation. Do not claim that a mailbox exists or accepts mail unless that has been established by a separate verification result. For each address, return: the original address, normalised address, format status, domain, domain status if it can be checked from the information provided, likely role or generic mailbox status, confidence, and the next check required. Use these categories only: valid-looking, invalid format, domain issue, likely generic mailbox, and needs external verification. Flag likely typos in the domain, duplicate addresses, disposable-looking domains and addresses that may be personal rather than business addresses. Do not invent company details, people, verification results or consent. Keep the original address unchanged in a separate field. Explain briefly why each address received its category. Address list: [PASTE ADDRESSES HERE]. Known company domains or account context: [PASTE CONTEXT HERE].
Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.
What it gets wrong
- AI cannot prove that a mailbox exists or accepts mail merely by recognising a plausible address.
- AI cannot provide a current deliverability result without access to a verification service or live mail-system checks.
- AI cannot decide whether you have a lawful and appropriate basis for contacting every person on the list.
- AI cannot distinguish every shared inbox, catch-all domain and temporary routing rule from a genuine individual mailbox.
- You still carry the consequences of bounces, unwanted contact and damage to your sender reputation.
What caps this at PARTLY: real time truth, verification cost and stakes of error.
How we scored this
Five axes, each scored nought to two by hand: ten means AI carries the task cleanly, and the thresholds that turn a total into YES, PARTLY or NO are published in the methodology. Each axis name links to its definition.
| Axis | Score (0–2) |
|---|---|
| Output | 1 |
| Inputs | 2 |
| Verification | 1 |
| Liability | 1 |
| Effort delta | 1 |
| Total | 6 / 10 |
The methodology and its thresholds are published in full.
FAQ
- Can ChatGPT check if an email address is valid?
- It can check the spelling, structure and apparent domain, and flag obvious problems. It cannot reliably confirm that the mailbox exists or accepts mail without a separate live verification service.
- How can I verify a business email address?
- Use AI to clean and triage the list, then run uncertain addresses through a dedicated email verification or enrichment workflow. Check the returned status against your CRM and current company information before sending.
- Can AI find the correct email address for a company?
- AI can suggest likely patterns and identify possible addresses from information you provide. Treat suggestions as unverified until a current source or verification service confirms them, and do not infer consent to contact.
- Is it safe to use AI to verify work email addresses?
- It is reasonably safe for format checks and list organisation if you minimise the personal data you share. Do not treat the output as proof of deliverability or permission to send, and check your UK data protection obligations before outreach.
Nearby answers
Assessed by gpt-5.6-luna (gpt-5.6-luna) on 2026-08-13, second-checked by an independent model. Wrong somewhere? Email [email protected] and it gets re-checked.
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