IMAP Sub-Folders and Mailboxes

How to select an IMAP sub-folder.

Download Chilkat Ruby Library

require 'chilkat'

imap = Chilkat::CkImap.new()

#  Anything unlocks the component and begins a fully-functional 30-day trial.
success = imap.UnlockComponent("Anything for 30-day trial")
if (success != true)
    print imap.lastErrorText() + "\n"
    exit
end

#  Connect to an IMAP server.
success = imap.Connect("mail.chilkatsoft.com")
if (success != true)
    print imap.lastErrorText() + "\n"
    exit
end

#  Login
success = imap.Login("admin@chilkatsoft.com","****")
if (success != true)
    print imap.lastErrorText() + "\n"
    exit
end

#  The default value of the mailbox hierarchy separator char
#  is a period '.' char.
print "Separator Char: " + imap.get_SeparatorChar() + "\n"

#  If you know your IMAP server's separator char, you may
#  explicitly set it.  For example:
imap.put_SeparatorChar("/")
print "Separator Char: " + imap.get_SeparatorChar() + "\n"

#  If you don't know the value of the separator char, the
#  Chilkat IMAP component sets it automatically during
#  a ListMailboxes call.  (The reason is that the IMAP separator
#  char is specified in the IMAP list mailboxes response.)

mboxes = imap.ListMailboxes("","*")

print "Separator Char: " + imap.get_SeparatorChar() + "\n"

#  To select a sub-folder, start with the top-level mailbox
#  and build a path using the separator char.  The top-level
#  mailbox should be named "Inbox":

s = imap.get_SeparatorChar()
folderPath = "Inbox" + s + "oldEmail"

success = imap.SelectMailbox(folderPath)
if (success != true)
    print imap.lastErrorText() + "\n"
    exit
end

print "Number of messages in " + folderPath + ": " + imap.get_NumMessages().to_s() + "\n";