are you using antivirus software to scan outgoing email? if so, disable the
email scanning part.

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Diane Poremsky [MVP - Outlook]
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Coauthor, OneNote 2003 for Windows (Visual QuickStart Guide)
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"Outlook - sending attachments" <Outlook - sending
attachments@discussions.microsoft.com> wrote in message
news:D31D6F2D-4689-4137-807B-30C4130B4C82@microsoft.com...
> Every time I try to send an email from Outlook 2003 with an attachment
> (any
[quoted text clipped - 9 lines]
> 'XXXXXXXXX' on 07/10/2005 18:10
> None of your e-mail accounts could send to this recipient.