qmail, recover email from the mess folder

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http://serverfault.com – The server has Plesk 10 installed. It uses qmail as the email service. After a migration from Linux based system to Windows based system, qmail is broken. It can send email fine but can't receive any email. I have fixed the problem afterward but old emails before the fix applied are stuck in the mail queue. I found mail contents are placed in the mess folder of the qmail directory. Before I try to write a program to extract those mail contents and resend them, if there has other way to fix those emails in the mail queue? I have tried qfixq but it doesn't work. (HowTos)