Question about Outlook Express

I have around 20 domains in a VPS, and on June, I got an spammer attack, which realayed spam during two days from one of my domains. When I saw the amount of email messages, I could stop it from doing so.

Hotmail got me blacklisted for this, and I have filled in the form to get me out of the blacklist, but still after 3 months, I am still blacklisted and cannot send any email to any hotmail or Live email account.

By the way, I make checks of my IPs on all blacklists, and they are OK in all of them.

Is there another way to try to get out of this blacklist?