Amazon SES: double dot
For CI's email class to work with Amazon SES, the newline needs to be set to \r\n, as noted in the comments above. See this question and answer.
Adding 'crlf' => "\r\n" fixed the issue with the following config:
/aaplication/config/email.php
<?php$config['protocol'] = 'smtp';$config['mail_smtp_secure'] = 'TLS';$config['smtp_host'] = 'ssl://email-smtp.us-west-2.amazonaws.com';$config['smtp_port'] = 465;$config['smtp_user'] = 'user';$config['smtp_pass'] = 'password';$config['charset'] = 'UTF-8';$config['mailtype'] = 'html';$config['newline'] = "\r\n";$config['crlf'] = "\r\n";$config['wordwrap'] = TRUE;$config['smtp_timeout'] = '20';$config['bcc_batch_mode'] = TRUE;?>
This issue was solved when we used the CodeIgnitor Amazon SES library : https://github.com/joelcox/codeigniter-amazon-ses