email-deep-validator
Verify email address checking MX records, and SMTP connection.
Installation
Install the module through NPM:
$ npm install email-deep-validator --save
Requires Node 7.6 or above
Examples
Include the module, create a new EmailValidator
object and call verify
method:
const EmailValidator = require('email-deep-validator')
const emailValidator = new EmailValidator()
const { wellFormed, validDomain, validMailbox } = await emailValidator.verify(
'foo@email.com'
)
When a domain does not exist or has no MX records, the domain validation will fail, and the mailbox validation will return null
because it could not be performed:
const { wellFormed, validDomain, validMailbox } = await emailValidator.verify(
'foo@bad-domain.com'
)
A valid Yahoo domain will still return validMailbox
true because their SMTP servers do not allow verifying if a mailbox exists.
Configuration options
timeout
Set a timeout in seconds for the smtp connection. Default: 10000
.
verifyDomain
Enable or disable domain checking. This is done in two steps:
- Verify that the domain does indeed exist;
- Verify that the domain has valid MX records.
Default: true
.
verifyMailbox
Enable or disable mailbox checking. Only a few SMTP servers allow this, and even then whether it works depends on your IP's reputation with those servers. This library performs a best effort validation:
- It returns
null
for Yahoo addresses, for failed connections, for unknown SMTP errors. - It returns
true
for valid SMTP responses. - It returns
false
for SMTP errors specific to the address's formatting or mailbox existance.
Default: true
.
useOpenSSL
Use openssl as fallback if STARTTLS is required by email server. Only valid with verifyMailbox
set to true
.
Default: false
.
ports
List of SMTP ports to try. Can be a single integer or array of integers. If array of integers, for example, [25,467,587]
, each port will be tried, and on timeout will advance to the next port.
Default: 25
.
Testing
$ npm test
Changelog
2.0.0
- (BREAKING) Requires node 7.6 for
async
/await
. - (BREAKING) Instead of throwing on any invalidation, the lib now returns an object with which validations failed.
- (BREAKING) Configuration property
verifyMxRecords
renamed to verifyDomain
. - (BREAKING) Configuration property
verifySmtpConnection
renamed to verifyMailbox
.
Contributing
This module was originally written to be used with Conversio and is used in a production environment currently. This will ensure that this module is well maintained, bug free and as up to date as possible.
Conversio's developers will continue to make updates as often as required to have a consistently bug free platform, but we are happy to review any feature requests or issues and are accepting constructive pull requests.