emails fail to arrive at destination - help!

  emidas 21:06 23 Nov 2006

Have Orange livebox (wired connection) and XP. I use Outlook (not express) for most of my emails and since installing XP (complete fresh install and wiping of PC) some of my emails arrive at their destination and some don't. Have not changed any of the settings from pre XP and Orange can't help because they only support Outlook Express. Any ideas or how I can test where the problem lies?
Many thanks.

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