title: Amazon Ses PHP SDK 2 - How to achieve high send rate
body: <p>Sending e-mails using the <code>sendEmail</code> method of the <code>SesClient</code> class from the PHP SDK currently takes about half a second per e-mail.  I'm looping through the array of recipients, and setting the message <code>ToAddresses</code> property to equal an array containing just the recipient e-mail address before calling <code>sendEmail()</code>.  I'd like to speed up the sending process but it seems to me that the PHP class provided by the SDK does one request per message (in my case, recipient). (Possibly one connection per message?)</p>
  
  <p>I did my bit of reading, and I considered using the <code>BccAddresses</code> property to send e-mails in batches but we would like the <code>To:</code> header to be explictly set, instead of saying just "undisclosed-recipients", so I'd like to know if anyone has a better approach.</p>