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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!!

Ramyachinna
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    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 Mar 16 '18 at 06:15
  • yes, I am using that. But I want to check without sending email to the user..That is my concern. – Ramyachinna Mar 16 '18 at 06:18
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    You can't programmatically verify an email address. The server its at won't for both security and privacy reasons allow that. – Asons Mar 16 '18 at 06:19
  • 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 Mar 16 '18 at 06:22
  • yes,@Gunasekaran I am using kickbox API ..But the requirement is without using That. – Ramyachinna Mar 16 '18 at 06:24
  • @GunasekaranR KickBox still need the user to verify – Asons Mar 16 '18 at 06:25
  • @LGSon, I got your point ...But still I am not satisfied...some inners feelings said that it should have some solution. – Ramyachinna Mar 16 '18 at 06:29
  • Don't you think all would use that if they could? ... Still no one does, and for a reason. With such solution spammer etc. could traverse all the servers and get every email address on earth available – Asons Mar 16 '18 at 06:32
  • @LGSon, okay... Thank you – Ramyachinna Mar 16 '18 at 06:35
  • Does this answer your question? [How to check mail address is exists or not?](https://stackoverflow.com/questions/13514005/how-to-check-mail-address-is-exists-or-not) – tripleee Jan 24 '20 at 08:27

1 Answers1

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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.

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

Updated

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

Asons
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