SMTP support without editing core plugin files

Hi ellenbo,
I had the same issue (also using Wp-Mail-SMTP) and the only way I see so far is to edit the core files. Based only on the conversation you mentioned, I have edited /wp-content/plugins/simple-subscribe/libs/SimpleSubscribe/Email.php and changed the sendEmail function to the below.

The next version of the plugin should automatically overwrite this.

Pascal.

private function sendEmail($recipients = array(), $subject = '', $data)
    {
        // recipients check
        if(!is_array($recipients)){ $recipients = array($recipients); }
        if(count($recipients) < 1){
            throw new EmailException('No subscribers provided. (possibly none in your system)');
        }
        // try sending e-mail
        try{

            // set HTML / or plaintext body
            if($this->htmlEmail == TRUE){
                $headers = array('Content-Type: text/html; charset=UTF-8');
            } else {
                $headers = array('Content-Type: text/plain; charset=UTF-8');
            }

            // Send the mail
            wp_mail( $recipients, $subject, $this->getEmailTemplate($data), $headers);
        } catch(\Exception $e){
            throw new EmailException($e->getMessage());
        }
    }