Send Mass E-mail PHPMAILER through G-Suite - php

Question

So i have the following code:
while(list($i, $data_subscriber) = each($subscriber)) {
$email_counter = $i + 1;
echo ($email_counter).') '.$data_subscriber->field_1.' '.$data_subscriber->field_2.' - '.$data_subscriber->email.''."\n";
flush();
$language = $data_subscriber->lang;
$body_mail = include($template_send_newsletter);
$first_name_idx = $data_subscriber->field_1;
$last_name_idx = $data_subscriber->field_2;
if (mail_send(strtolower($data_subscriber->email),
( IsSet($first_name_idx) && IsSet($last_name_idx) ? $first_name_idx.' '.$last_name_idx : $data_subscriber->email ),
$site_admin,
$site_name,
'Newsletter ['.date('d/m/Y', time()).']',
true,
$body_mail,
NULL,
false)) {
reset($data_subscriber->newsletter_item);
unset($log_detail);
$log_detail = "";
while(list($j, $list_of_news_to_send) = each($data_subscriber->newsletter_item)) {
$log_detail = ( IsSet($list_of_news_to_send->title) ? $list_of_news_to_send->title."\n" : '');
$log_detail = ( IsSet($list_of_news_to_send->subtitle) ? $list_of_news_to_send->subtitle."\n" : '');
$log_detail = ( IsSet($list_of_news_to_send->creation_date) ? $list_of_news_to_send->creation_date."\n" : '');
$log_detail = "\n";
} /* end while */
write_newsletter_detail($data_subscriber->id_subscription,
$data_subscriber->email,
'Y',
$log_detail);
}
else {
write_newsletter_detail($data_subscriber->id_subscription,
$data_subscriber->email,
'N',
NULL);
} /* end if mail_send */
} /* end while */
And the following function
function mail_send($rcpt_to,
$to_name,
$mail_from,
$from_name,
$subject,
$isHTML = true,
$body,
$attachment = NULL,
$direct_delivery = false,
$reply_to = NULL){
$mail = new PHPmailer;
$mail->isSMTP();
$mail->SMTPDebug = 3;
$mail->Debugoutput = 'html';
$mail->Host = 'smtp.gmail.com';
$mail->Port = 587;
$mail->SMTPSecure = 'tls';
$mail->SMTPAuth = true;
$mail->Username = "mail#domain.com";
$mail->Password = "password";
$mail->Timeout = 3600;
$mail->addAddress(trim($rcpt_to), trim($to_name));
$mail->setFrom($mail_from,$from_name);
$mail->Subject = $subject;
$mail->Body = $body;
if ($isHTML) {
$mail->IsHTML(true);
$mail->AltBody = strip_tags($mail->Body);
}
if (IsSet($attachment)) {
$mail->AddAttachment($attachment['tmp_name'], $attachment['name']);
}
if (IsSet($reply_to)) {
$mail->AddReplyTo($reply_to);
}
if (!$mail->send()) {
return false;
} else {
return true;
}
}
I am using PHPMailer to send multiple e-mails using gmail SMTP server.
I have 4 files containing different but almost the same code to send newsletter.
One of my files is sending all the emails to ( ~60 recipients )
The other 3 files, each of them needs to send one email to ~600 recipients.
Problem occures here, half of the e-mails are sent the other are not.
If I run the script but this time for fewer recipients witch didn't recieved the e-mail first time, it's sending.
I'm using GMAIL with my own domain. So i'm not exceeding any limit.
What may cause this problem ? Any ideas ? Thank you.
UPDATE**
SERVER -> CLIENT: 454 4.7.0 Too many login attempts, please try again later. e11sm950198edd.68 - gsmtp
After some emails that are sent i recieve this error. Any ideas why ?
UPDATE***
$mail = new PHPMailer;
$mail->isSMTP();
$mail->SMTPDebug = 3;
$mail->Host = 'smtp.gmail.com';
$mail->SMTPAuth = true;
$mail->SMTPKeepAlive = true; // SMTP connection will not close after each email sent, reduces SMTP overhead
$mail->Port = 465;
$mail->SMTPSecure = 'ssl';
$mail->Username = "domain#domain.com";
$mail->Password = "password";
$mail->setFrom($site_noreply, $site_name);
$subjectnewsletter = 'Newsletter ['.date('d/m/Y', time()).']';
$mail->Subject = $subjectnewsletter;
$mail->AltBody = 'To view the message, please use an HTML compatible email viewer!';
reset($subscriber);
while(list($i, $data_subscriber) = each($subscriber)) {
$email_counter = $i + 1;
echo ($email_counter).') '.$data_subscriber->field_1.' '.$data_subscriber->field_2.' - '.$data_subscriber->email.''."\n";
flush();
$language = $data_subscriber->lang;
$first_name_idx = $data_subscriber->field_1;
$last_name_idx = $data_subscriber->field_2;
$fullname = $first_name_idx.' '.$last_name_idx;
$bodymail = include($template_send_newsletter);
$mail->msgHTML($bodymail);
$mail->addAddress($data_subscriber->email, $fullname);
reset($data_subscriber->newsletter_item);
unset($log_detail);
$log_detail = "";
while(list($j, $list_of_news_to_send) = each($data_subscriber->newsletter_item)) {
$log_detail = ( IsSet($list_of_news_to_send->title) ? $list_of_news_to_send->title."\n" : '');
$log_detail = ( IsSet($list_of_news_to_send->subtitle) ? $list_of_news_to_send->subtitle."\n" : '');
$log_detail = ( IsSet($list_of_news_to_send->creation_date) ? $list_of_news_to_send->creation_date."\n" : '');
$log_detail = "\n";
} /* end while */
if (!$mail->send()) {
write_newsletter_detail($data_subscriber->id_subscription,
$data_subscriber->email,
'N',
NULL);
echo $mail->ErrorInfo;
break; //Abandon sending
} else {
write_newsletter_detail($data_subscriber->id_subscription,
$data_subscriber->email,
'Y',
$log_detail);
echo "Message sent";
}
$mail->clearAddresses();
$mail->clearAttachments();
} /* end while */
I managed to change my code so it's not connect to the smtp server every e-mail.
But now after it sends 93 emails i get the follosing error:
SMTP server error: MAIL FROM command failed

Answer 1

You need to use an MTA that uses more than one connection and it already setup to respect limits of the servers you're connecting to. At this point you're attempting to exceed the limits of the server you're connecting to and companies like Google frown on too many connections or using their mail servers for broadcasts.
Look for a mail sending service if your numbers are modest, or consider purchasing and hosting an MTA if you send a considerable amount of email.

Answer 2

You can use SMTP relay configuration which allow you to send email from your server with any of your email domain address.