deep-email-validator

Validates email addresses based on regex, common typos, disposable email blacklists, DNS records and SMTP server response.

• Validates email format (contains @, . in domain, no spaces or control characters).
• Validates common typos e.g. [email protected] using mailcheck.
• Validates email was not generated by a disposable email service using disposable-email-domains.
• Validates MX records are present on DNS.
• Validates SMTP server is running.
• Validates mailbox exists on SMTP server.
• Sanitizes inputs to prevent SMTP command injection.
• Native TypeScript support.

Getting Started

Requires Node.js >= 20. Server-side only (not browser compatible).

Installation

npm install deep-email-validator

Usage

import { validate } from 'deep-email-validator'

const res = await validate('[email protected]')
// {
//   "valid": false,
//   "reason": "smtp",
//   "validators": {
//       "regex": {
//         "valid": true
//       },
//       "typo": {
//         "valid": true
//       },
//       "disposable": {
//         "valid": true
//       },
//       "mx": {
//         "valid": true
//       },
//       "smtp": {
//         "valid": false,
//         "reason": "Mailbox not found.",
//       }
//   }
// }

You can also pass an options object to control which validations run:

await validate({
  email: '[email protected]',
  sender: '[email protected]',
  validateRegex: true,
  validateMx: true,
  validateTypo: true,
  validateDisposable: true,
  validateSMTP: true,
})

Default options can be found here.

Custom TLDs

If you want to validate domains with TLDs that are not supported by default, use the additionalTopLevelDomains option:

await validate({
  email: '[email protected]',
  additionalTopLevelDomains: ['ir'],
})

For a list of TLDs supported by default, see mailcheck defaults.

const { validate } = require('deep-email-validator')

const res = await validate('[email protected]')