my problem is, when i log in, i can't see the mail. the new mail files are being created in /home/username/Maildir/new but... mail clients can't see it.
This is a configuration issue with your pop3/imap service. You'll need to configure it to support maildir and probably tell it where to look for the mail directory.
If you think you have an issue with the maildir themselves, you can try opening them with mutt (mutt -f /path/to/maildir/folder). My guess is it's a configuration issue as stated above though. Hope this helps.
