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I'm trying to make sure a user types in a valid email that also actually exists, not just valid in format. There is a npm package called email-existence that should do this but every email returns a false so that is not reliable. If there is a javascript/Node.js Package that does this job, it would be great, but is there also a way I can do this myself? Like ways to create a small module for this functionality?

user3467433
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3 Answers3

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The only guaranteed way to find out whether an e-mail address exists is to send an e-mail to it - this is why verification e-mails exist.

There's a similar discussion here with a few answers detailing possible ways to try and determine if an address exists on a server, but none are guaranteed to work on every server.

Alternatively, you could use a paid service such as Kickbox.io (they also have a 100/day free quota), which claims to verify that an e-mail address exists as well as determine the "quality" (based on deliverability and other metrics) of an address. Kickbox has a node.js package.

Community
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ttarik
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Installation To install via npm:

npm install email-existence

Usage

Check existence:

emailExistence.check('email@domain.com', function(err,res){
    console.log('res: '+res);
});
Jijo Paulose
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    I found this one not validating yahoo, even though the email id doesn't exits, it returns true – Ankit Sep 02 '16 at 07:39
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    This package doesn't seem to work too well. Validates some gmail addresses. but most corporate emails it can't seem to validate. – shoke May 17 '19 at 19:13
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I think "email-verifier" package will come handy in this case

Source : https://medium.com/whois-api/how-to-verify-an-email-address-using-node-js-449330a47a7e

Manav Kothari
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