[Hunter.io] Verify Email
The [Hunter.
Verify email deliverability using Hunter.io
The [Hunter.io] Verify Email block checks whether a given email address is valid and deliverable by running it through Hunter.io's verification service. It examines factors such as email format, MX records, SMTP server availability, and mailbox-level deliverability, then returns a structured result you can use to make decisions in your workflow.
The block takes a single required input — the email address to verify — and an optional destination variable where the full JSON result will be stored. The output includes a status string (such as "valid", "invalid", "accept_all", "webmail", "disposable", or "unknown"), a deliverability result, a confidence score between 0 and 100, and boolean flags indicating whether the address is disposable, a webmail account, has MX records, and passed an SMTP check.
This block fits into workflows that involve processing user-submitted email addresses, managing contact lists, or qualifying leads before passing them to downstream CRM or outreach steps. It is commonly used alongside form intake flows, lead enrichment pipelines, or data cleaning workflows where email quality needs to be assessed before further action is taken.
What you can build
Real-world workflows powered by the [Hunter.io] Verify Email block.
Lead Form Validation
Verify email addresses submitted through a lead capture form before storing them in a CRM, filtering out invalid or disposable addresses.
Contact List Cleaning
Run a batch of existing contact emails through verification to identify invalid or undeliverable addresses and flag them for removal.
Outreach Campaign Filtering
Screen email addresses before adding them to an outreach sequence, ensuring only addresses with a high confidence score are included.
Disposable Email Detection
Identify and block sign-ups using disposable or temporary email addresses by checking the disposable boolean flag in the verification result.
CRM Enrichment Pipeline
Add email verification as a step in a lead enrichment workflow, appending the deliverability score and status to each contact record.
User Registration Screening
Validate email addresses at the point of user registration to reduce bounce rates and prevent fake account creation.
Ready to add [Hunter.io] Verify Email to your workflow?
Get Started FreeCommon questions about [Hunter.io] Verify Email
What are the required parameters for this block?
The only required parameter is the email address to verify, provided as a string. You can also specify an optional destination variable where the full JSON result will be stored for use later in the workflow.
What does the block return?
The block returns a JSON object containing a status string, a deliverability result string, a confidence score from 0 to 100, the verified email address, and four boolean fields: disposable, webmail, mx_records, and smtp_check.
What are the possible values for the status field?
Based on the block's usage notes, the status field can return one of the following values: "valid", "invalid", "accept_all", "webmail", "disposable", or "unknown".
What kinds of workflows commonly use this block?
This block is commonly used in lead capture and qualification workflows, contact list cleaning pipelines, CRM enrichment flows, and user registration screening — any scenario where the deliverability or legitimacy of an email address needs to be assessed before further processing.
Does the block check more than just email format?
Yes. In addition to format validation, the block checks for MX records and performs an SMTP check, with the results of each surfaced as boolean fields (mx_records and smtp_check) in the output.
Related capabilities
[Hunter.io] Find Email
Find an email address for a specific person at a domain using Hunter.io.
[Hunter.io] Enrich Person
Look up professional information about a person by their email address using Hunter.io.
[Hunter.io] Enrich Company
Look up company information by domain using Hunter.io.
[Hunter.io] Domain Search
Search for email addresses associated with a domain using Hunter.io.
[ActiveCampaign] Create Contact
Create or sync a contact in ActiveCampaign.
[ActiveCampaign] Add Note
Add a note to an existing contact in ActiveCampaign.
Add [Hunter.io] Verify Email to your workflow
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