@devmehq/email-validator-js NPM

Advanced Email Validator

Verify email address checking MX records, and SMTP connection, check for disposable email addresses and free email providers.

Features

✅ Check email address validity

✅ Check email address domain validity in domain TLD list

✅ Check email address MX records

✅ Check email address SMTP connection

✅ Check email address disposable or burnable status

✅ Check email address free email provider status

🚨 Check domain age and quality score - soon

🚨 Check domain registration status - soon

Use cases

Increase delivery rate of email campaigns by removing spam emails
Increase email open rate and your marketing IPs reputation
Protect your website from spam, bots and fake emails
Protect your product signup form from fake emails
Protect your website forms from fake emails
Protect your self from fraud orders and accounts using fake emails
Integrate email address verification into your website forms
Integrate email address verification into your backoffice administration and order processing

API / Cloud Hosted Service

We offer this email verification and validation and more advanced features in our Scalable Cloud API Service Offering - You could try it here Email Verification

Self-hosting - installation and usage instructions

Installation

Install the module through YARN:

yarn add @devmehq/email-validator-js

Or NPM

npm install @devmehq/email-validator-js

Examples

import { verifyEmail } from '@devmehq/email-validator-js';

const { validFormat, validSmtp, validMx } = await verifyEmail({ mailbox: 'foo@email.com', verifyMx: true, verifySmtp: true, timeout: 3000 });
// validFormat: true
// validMx: true
// validSmtp: true

When a domain does not exist or has no MX records, the domain validation will fail, and the mailbox validation will return null because it could not be performed:

const { validFormat, validSmtp, validMx } = await verifyEmail({ mailbox: 'foo@bad-domain.com', verifyMx: true, verifySmtp: true, timeout: 3000 });
// validFormat: true
// validMx: false
// validSmtp: null

A valid Yahoo domain will still return validSmtp true because their SMTP servers do not allow verifying if a mailbox exists.

Configuration options

`timeout`

Set a timeout in seconds for the smtp connection. Default: 10000.

`verifyMx`

Enable or disable domain checking. This is done in two steps: 1. Verify that the domain does indeed exist; 2. Verify that the domain has valid MX records. Default: false.

`verifySmtp`

Enable or disable mailbox checking. Only a few SMTP servers allow this, and even then whether it works depends on your IP's reputation with those servers. This library performs a best effort validation:

It returns null for Yahoo addresses, for failed connections, for unknown SMTP errors.
It returns true for valid SMTP responses.
It returns false for SMTP errors specific to the address's formatting or mailbox existence. Default: false.