So we send more than 10000 emails per day.
Given that a day has 86400 seconds that is a seriously non-existing rate of one email per 8.6 seconds. My phone can do more.
If the Ip is blocked by Spam, what I need to do.
Do not send spam. Email marketing generally is seen as spam unless people approve it. Seems enough people do not. Which means your email IS spam.
I am one of those people that gladly report every spammer and don't really want to get bothered by people too stupid to understand my time has value.
Now, if you run a regular mailing list - with all the stuff that law and common sense ask for, like double sign up with confirmations - then you need to start doing your home work and finding out WHY your IP's are marked as spam.
Start at sites like http://mxtoolbox.com/blacklists.aspx to check which blacklist has you. Contact the relevant addresses at major recipients (gmail etc.) and get whitelisted.
Or hire a company running that as service - it is a LOT of work.