Thanks for trying spannersatcx,
I guess I should have specified that I'm using Outlook '97 (part of Office Professional '97). There isn't a Mail Format tab in the options menu. (Tools/options from the tools menu in inbox/outbox - as opposed to having opened a message although there isn't one there either!)
Maybe I need an upgrade, can you buy the upgrade to Office 2000 from '97 or do upgrades only work from the previous version?
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Keep it up!