com.sun.mail.mbox
Interfaces 
FileInterface
InboxFile
MailFile
Classes 
DefaultMailbox
Mailbox
MboxFolder
MboxMessage
MboxStore
NewlineOutputStream
SolarisMailbox
SunOSMailbox
SunV3BodyPart
SunV3Multipart
UNIXFile
UNIXFolder
UNIXInbox