HELO header in email

C

Chillpill

Hi

When I send an email from Outlook 2003, the resulting received header has

Received: from unknown (HELO xxxxoffice) (82.33.1nn.mmm)

This is causing many recipient ISPs to reject my mail, particularly hotmail.
xxxxoffice is of course my computername

How can I change this? I don't think there's anything in Outlook I can change?

Regards
Chillpill
 

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