check all maildir subdir
dir = "/var/customers/mail/wimsnel/aan@wimsnel.nl"
#p Dir.glob(dir)
dirs =Dir.entries(dir).select {|entry|
File.directory? File.join(dir,entry) and !(entry =='.' || entry == '..')
}
dirs.each do |d|
p dir + ':' + d
#p d
sd =Dir.entries(File.join(dir,d)).select {|entry|
File.directory? File.join(dir,entry) and !(entry =='.' || entry == '..')
}
p sd
end