Failed integration with Amazon's Simple Email Service (SES)

I recently ran into an issue using AWS's simple email service as the mail backend for a D7 site: the "Errors-To" header is blocked by SES, and the site won't send any mail. Here's a list of accepted headers from Amazon: http://docs.amazonwebservices.com/ses/2010-12-01/DeveloperGuide/index.ht...

To get things working, I just had to remove that header from mail.inc, and there was even a comment saying that the header was "redundant."

Here's a patch showing what I did. Hopefully this helps...