Sending emails in a foreach loop. Best way to do this?

[eMonk]

Would it be better not to mail and loop or to create a BCC list by imploding the recipients list and send them out in one single blast?

[AbraCadaver]

BCC I think, if it is a generic bulk email.  If you have a cron or something that the web interface is not waiting to complete then it may not matter.  But with BCC you're not going to be able to detect a failure with individuals in PHP.  You'll need to monitor the queue for the sending address for bounces.

[lemmin]

Depending on your goal, you might want to set up a listserv.

[DavidAM]

Keep in mind, the mail specification does NOT require that the BCC list NOT be distributed. That is, the people in the TO and CC (which would be empty in your example) will NOT see the BCC list. However, the full list of BCC recipients might be shown to all BCC recipients in the list. That would then be effectively the same as putting everyone in the TO list (in this case).

 

The "correct" way to do this is to send a separate message to each recipient, or use a true list service.

[eMonk]

The emails being sent out are notifications that their accounts have been approved along with their login and password.

 

I don't want the people in the BCC recipients list to see all addresses in the list. So, emailing users separating in the foreach loop would be best for this?

[kicken]

If you're going to include their login and password in the email, then you have to send out individual emails since each email needs to be customized for the target recipient.

[jazzman1]

Mails in a loop or mail function insde a loop - NEVER.

Put everything into array() and implode them.

 

Something like:

// this data comes from the database
$headerFields = array('BCC:  example_1@example.com,example_2@example.com,example_3@example.com,example_4@example.com,example_5@example.com');
$headers = 'MIME-Version: 1.0' . "\n" .
                 'Content-type: text/plain; charset=UTF-8' . "\n" .
                 'Content-Transfer-Encoding: base64' . "\n";
                 'X-Priority: 1 (Higuest)' . "\n";
                 'X-MSMail-Priority: High' . "\n";
                 'Importance: High' . "\n";
$headers .= implode(',', $headerFields)."\n";
$message = "UserName: $user_name \n
            UserPass: $password \n";

if(mail(null, '=?UTF-8?B?'.base64_encode($subject).'?=', base64_encode($message), $headers . '')){
     echo "Message sent"; /* redirect the page */ exit; 
      } else {
     echo "Message failed"; 
}