After seaching the net i found that my ISP (tiscali) was the main cause of the
problem and they are still having many issues with their amil servers.
If iwas to change ISP`s would i just overight the previous script? here www.howtoforge.com/postfix_relaying_through_another_mailserver
If anyone is interested I found a great ISP that offers a home package from £9.49 per month including a static IP . Also business broadband from £25 per month including up to 8 static IP`s.
If it`s ok with falko and till i will post the link here.