node.js - How should I verify email address existence and domain name existence in javascript or nodeJs? - Stack Overflow

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I have tried so many npm packages to verify the email address and domain name. Here are the some of the npm packages I have tried

email-check,
email-verify,
email-existence, 
legit,
email-validator and,
email validation 

all these results in domain name existence and some other checks only. But I have to verify the particular email address exist in the domain. How should I achieve this... Can anyone pls help me to find it out Thanks in advance!!

I have tried so many npm packages to verify the email address and domain name. Here are the some of the npm packages I have tried

email-check,
email-verify,
email-existence, 
legit,
email-validator and,
email validation 

all these results in domain name existence and some other checks only. But I have to verify the particular email address exist in the domain. How should I achieve this... Can anyone pls help me to find it out Thanks in advance!!

• javascript
• node.js
• email-validation
• email-verification

Share Follow asked Mar 16, 2018 at 6:13 RamyachinnaRamyachinna 48311 gold badge1111 silver badges2020 bronze badges 10

• 3 Just send a verify link on the email given by the user and let them verify it. There is a reason this procedure is widely use by most applications. – Bk Santiago Commented Mar 16, 2018 at 6:15
• yes, I am using that. But I want to check without sending email to the user..That is my concern. – Ramyachinna Commented Mar 16, 2018 at 6:18
• 1 You can't programmatically verify an email address. The server its at won't for both security and privacy reasons allow that. – Asons Commented Mar 16, 2018 at 6:19
• You can try with npm legit, it will be handy to check domain existance, or else you can go with Kick Box validation which is a paid service – GunasekaranR Commented Mar 16, 2018 at 6:22
• yes,@Gunasekaran I am using kickbox API ..But the requirement is without using That. – Ramyachinna Commented Mar 16, 2018 at 6:24

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1 Answer 1

Sorted by: Reset to default 7

Today (and probably never) it is not possible to programmatically verify an email address.

The server its at won't for both security and privacy reasons allow that.

And for a good reason. With such solution, spammers etc. could traverse all the servers and get every email address available.

As a note, there are tools out there that claims being email verification solutons. They generally use DNS validations, including MX record(s) lookup, but they can't with 100% accuracy say if an email address exist or not, they can only get what the email server is setup to give them.

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Domain name can be though, and NSLookup is one of the services that can do that.

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Updated

I found a few good reads at SO (where the first is actually a dupe, though can't close it myself)

• How to check if an email address exists without sending an email?

• How to validate an email address using a regular expression?

• How to validate an email address in JavaScript?

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