setCharset('utf-8'); // Without these lines the default caching mechanism is "array" but this uses a lot of memory. // If possible, use a disk cache to enable attaching large attachments etc. // You can override the default temporary directory by setting the TMPDIR environment variable. if (@is_writable($tmpDir = sys_get_temp_dir())) { $preferences->setTempDir($tmpDir)->setCacheType('disk'); }