flow / email-checker
Check if email addresses exist on a mail server over SMTP using ReactPHP's famous non-blocking event loop
0.3.0
2013-11-06 10:35 UTC
Requires
- react/react: 0.3.*
README
EmailChecker connects to mail servers over SMTP and asks them to verify email addresses. The library uses ReactPHP's event-driven IO layer to handle all the socket communication.
Key features:
- N connections are opened concurrently and handled asyncronously thanks to ReactPHP.
- Connections are pooled and kept alive so that multiple requests to the same domain are handled efficiently.
Caveats:
- SMTP servers respond with any old random response and can't be trusted especially when requesting a mailbox's RCPT (though this approach is better than nothing).
- MX records are resolved using
getmxrr()
and therefore that operation is blocking.
To do:
- Implement
React/DNS
when is supports MX record resolution. - Unit test all of the things.
Example:
use Flow\EmailChecker\ConnectionPool;
use Flow\EmailChecker\MailboxUser;
$loop = React\EventLoop\Factory::create();
$emails = array(
'stephen@flowsa.com',
'i-dont-exist-asdf-1234@gmail.com'
);
$connectionPool = new ConnectionPool($loop, 'flowsa.com', 'stephen', function (ConnectionPool $pool) use (& $emails) {
$email = array_shift($emails);
if (!$email) {
return false; // Returning false will cause the connection pool to drain and eventually die
}
$pool->add(
$email,
function (MailboxUser $email) { // Bind in a closure for the callback that occurs after an email is resolved
echo $email->getEmail() . ($email->exists() ? ' exists' : ' does not exist') . "\n";
}
);
}, function ($str) {
echo "$str\n";
});
$connectionPool->setConcurrency(10);
$connectionPool->run();