muzich/vendor/swiftmailer/lib/preferences.php

<?php

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/* YOU MAY WISH TO MODIFY OR REMOVE THE FOLLOWING LINES WHICH SET DEFAULTS  */
/*                                                                          */
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// Sets the default charset so that setCharset() is not needed elsewhere
Swift_Preferences::getInstance()->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 (function_exists('sys_get_temp_dir') && is_writable(sys_get_temp_dir())) {
    Swift_Preferences::getInstance()
        -> setTempDir(sys_get_temp_dir())
        -> setCacheType('disk');
}

Swift_Preferences::getInstance()->setQPDotEscape(false);