You can try using the AWS SDK for PHP. You can send emails through the SES API, and the SDK allows you to send multiple emails in parallel. Here is a code sample (untested and only partially complete) to get you started.
<?php
require 'vendor/autoload.php';
use Aws\Ses\SesClient;
use Guzzle\Service\Exception\CommandTransferException;
$ses = SesClient::factory(/* ...credentials... */);
$emails = array();
// @TODO SOME SORT OF LOGIC THAT POPULATES THE ABOVE ARRAY
$emailBatch = new SplQueue();
$emailBatch->setIteratorMode(SplQueue::IT_MODE_DELETE);
while ($emails) {
// Generate SendEmail commands to batch
foreach ($emails as $email) {
$emailCommand = $ses->getCommand('SendEmail', array(
// GENERATE COMMAND PARAMS FROM THE $email DATA
));
$emailBatch->enqueue($emailCommand);
}
try {
// Send the batch
$successfulCommands = $ses->execute(iterator_to_array($emailBatch));
} catch (CommandTransferException $e) {
$successfulCommands = $e->getSuccessfulCommands();
// Requeue failed commands
foreach ($e->getFailedCommands() as $failedCommand) {
$emailBatch->enqueue($failedCommand);
}
}
foreach ($successfulCommands as $command) {
echo 'Sent message: ' . $command->getResult()->get('MessageId') . "\n";
}
}
// Also Licensed under version 2.0 of the Apache License.
You could also look into using the Guzzle BatchBuilder
and friends to make it more robust.
There are a lot of things you will need to fine tune with this code, but you may be able to achieve higher throughput of emails.