check-email-exists

Check if an email address exists before sending the email. Neon-binding Rust crates "check-if-email-exists".

Features

From the check-if-email-exists repo README.md get more details.

✅ Email deliverability: Is an email for this address deliverable?

However, it goes more into details, and checks all the following properties of an email address:

✔️ Syntax validation. Is the address syntactically valid?

✔️ DNS records validation. Does the domain of the email address have valid MX DNS records?

✔️ Disposable email address (DEA) validation. Is the address provided by a known disposable email address provider?

✔️ SMTP server validation. Can the mail exchanger of the email address domain be contacted successfully?

✔️ Mailbox disabled. Has this email address been disabled by the email provider?

✔️ Full inbox. Is the inbox of this mailbox full?

✔️ Catch-all address. Is this email address a catch-all address?

Output Example

{
	"input": "someone@gmail.com",
	"misc": {
		"is_disposable": false
	},
	"mx": {
		"records": [
			"alt3.gmail-smtp-in.l.google.com.",
			"gmail-smtp-in.l.google.com.",
			"alt1.gmail-smtp-in.l.google.com.",
			"alt4.gmail-smtp-in.l.google.com.",
			"alt2.gmail-smtp-in.l.google.com."
		]
	},
	"smtp": {
		"has_full_inbox": false,
		"is_catch_all": false,
		"is_deliverable": false,
		"is_disabled": true
	},
	"syntax": {
		"address": "someone@gmail.com",
		"domain": "gmail.com",
		"username": "someone",
		"valid_format": true
	}
}

Installation

npm install check-email-exists

Usage

import { checkEmailExists ,checkEmailExistsSync} from 'check-email-exists';

// async check the email
await checkEmailExists("toEmail@gmail.com");

// sync check the email
checkEmailExistsSync("toEmail@gmail.com","fromEmail@gmail.com");

Local Setup

git clone https://github.com/ZiNai/check-email-exists
cd check-email-exists
npm i
npm test