PHP

Verify Email Recipients

A way to possibly determine valid/invalid email addresses. I would recommend being very careful about doing this because your IP address may be flagged as a potential spammer by the mail server (because you are probing for valid/invalid email addresses). This Chilkat functionality existed for many years, before this kind of activity became a problem. The functionality remains only because it is useful for some to test with their own SMTP servers. Chilkat2 PHP

<?php

use Chilkat2\Email;
use Chilkat2\MailMan;
use Chilkat2\StringArray;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$mailman = new MailMan();

// SMTP connection settings...
$mailman->SmtpHost = 'smtp.example.com';
$mailman->SmtpUsername = 'MY_SMTP_USERNAME';
$mailman->SmtpPassword = 'MY_SMTP_PASSWORD';
$mailman->SmtpSsl = true;
$mailman->SmtpPort = 465;

// Create a new email object
$email = new Email();

$email->Subject = 'This is a test';
$email->Body = 'This is a test';
$email->From = 'myemail@example.com';
$email->AddTo('person1', 'person1@example.com');
$email->AddTo('person2', 'person2@example.com');
$email->AddTo('person3', 'person3@example.com');
// The SMTP server smtp.example.com won't know anything about an email address @somewhere_else.com
$email->AddTo('person3', 'person4@somewhere_else.com');
// ...

// Verify recipients.
// **** See the warning about using this API method in the description above.
// (An SMTP server only knows valid email address for its own domain.  For example,
// smtp.example.com *may* only know if person1@example.com is valid or invalid, but does
// not know anything about the validity of email addresses having other domains.)
$badAddrs = new StringArray();
try {
    $mailman->VerifyRecips($email, $badAddrs);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

$i = 0;
while ($i < $badAddrs->Count) {
    echo $badAddrs->GetString($i), "\n";
    $i = $i + 1;
}

echo "done.\n";