sendmail

  1. Increase memory limit (Rackspace provides 32 MB by default). I use the following at the top of my .htaccess files:

    # Overridden PHP settings:
    #
    php_value memory_limit 128M
    php_value max_execution_time 60
    php_value post_max_size 128M
    php_value upload_max_filesize 128M