1. When digest program should run ?
Anytime OK. Please edit crontab.
2. Can we change default compression style in digest delivery ?
No since fml8 supports only MIME/Multipart now.
3. Can we specify parameters in running "makefml add" ?
No since fml8 supports only MIME/Multipart now.
4. Can we log digest log mesages in the file other than the default log file ?
Not configurable. But you can if you us HOOK.
[Example]
$article_digest_prepare_start_hook = q{
$config->{ log_file } = "/some/where/log.digest";
};