If saving a composed message in a sent-mail folder, determine if all attachment data is saved. The following options are available:
* "Always save attachments" - NEVER prompt to save attachments in compose screen; the attachments are ALWAYS saved with the message.
* "Prompt every time an attachment is sent; default to YES" - ALWAYS prompt to save attachments in the compose screen; the default is to save attachments.
* "Prompt every time an attachment is sent; default to NO" - ALWAYS prompt to save attachments in the compose screen; the default is to not save attachments.
* "Never save attachments" - NEVER prompt to save attachments in compose screen; the attachments are NEVER saved with the message.