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Articles and examples

Emvero blog

Find the article that answers your question about an address, a domain or an API workflow. The examples explain what a check establishes, what remains uncertain and how to use the response.

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Email validation in JavaScript: a working form example

Build an email field with clear errors, test its limits, and pass accepted input to your server for independent validation.

Should you block role-based email addresses at signup?

Decide whether a role address belongs in a login or contact field. Keep address checks, your access rules and mailbox confirmation separate.

Email verification vs email confirmation

Verification checks address evidence. Confirmation shows access to a message. Compare the two and keep their results separate in your signup flow.

Email domain intelligence: how to read a domain profile

A domain profile brings mail routing, network and registration observations together. A worked example shows how to use them without confusing infrastructure with mailbox validity or trust.

SPF vs DMARC: what a domain's DNS records tell you

SPF authorises sending hosts. DMARC checks alignment with the visible From domain. Learn what those records establish alongside MX, and where DNS evidence ends.

When to verify an email list again

Use the next send and the age of your last check to decide when a list needs new evidence. A calendar reminder alone cannot make an old result current.

How to find the email provider for a domain

MX records show where a domain receives mail, but the visible host may be a gateway, a backup route or a custom name. Learn what DNS can identify and where the answer stays unknown.

Is an email address with a plus sign valid?

An email address containing a plus sign can be valid. Preserve the complete local part, verify the address that was submitted and handle account policy separately.

Can a domain receive email without an MX record?

Missing MX records do not settle whether a domain can receive mail. Follow the DNS answer through implicit routing, null MX and unresolved targets before deciding.

How email verification gathers evidence

Follow an address through syntax, DNS, mail routing and SMTP checks. Learn what each stage can establish and why a completed check can still return unknown.

Verify a CSV email list through the API

Run a server-side request for each CSV row, wait for pending checks to finish and save the evidence or error alongside the source data. The workflow runs in your own system.

Check an address at a catch-all domain

A server that accepts arbitrary recipients leaves the individual mailbox unresolved. Follow the domain and SMTP evidence, then decide when confirmation is needed.

Read an email verification result

Read the status, recommended action, check evidence and observation dates together. Complete JSON examples show how to handle an inconclusive result.

Read the evidence from your own check

Create an account to check an address or inspect a domain. Use the articles to understand the fields and limits of the result.

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