jpcadillac

Thank you Jared. I got it to work.

add_filter('wp_mail_smtp_custom_options', function($phpmailer) {
  $phpmailer->addCustomHeader('X-SES-MESSAGE-TAGS', 'tagName1=tagValue1');
  $phpmailer->addCustomHeader('X-SES-CONFIGURATION-SET','myConfigurationSet');
  return $phpmailer;
});

I ended up changing:

location ~ ^/.*\.php$ {
    try_files $uri = 404;
    fastcgi_pass unix:/var/run/php5-fpm.sock;
    fastcgi_index index.php;
    include fastcgi_params;
  }

to

location ~ ^/.*\.php$ {
    try_files $uri $uri/ /index.php?$args;
    fastcgi_pass unix:/var/run/php5-fpm.sock;
    fastcgi_index index.php;
    include fastcgi_params;
  }

It now works, but I feel that is a security issue now.

Thank you. I wasn’t aware the plugin could use the translation __() function with parameters in that format.