A few comments on the Quick Save plugin:
- Make sure that you do not download and install the obsolete version of Compose in New Window plugin from the plugins page. It will not play nicely with Quick Save.
- If you encrypt your saved emails, due to RFC-based standards on the length of cookies (nothing that can be done about this that I can tell), be aware that the length of restored messages will be very short (long messages will be cut off).
- Note that users with relatively slow machines, running any of the encryption levels will make the saves very noticable and can sometimes take a couple seconds.