Dave Wreathall wrote:

We have a small networking group (30 people) and would like to share
each others' contact details, but we're not on the same server or
system. So I saved everyone's details in Windows Address Book as a
separate set of contacts, saved this as a windows address book file
and emailed it round. No-one seems to be able to open it properly,
and I can't use any of the email addresses to send emails either.

You can't import a WIndows Address Book file with Outlook. In fact, there's
no way to export to a WAB with any current version of Outlook. Explain how
you created the WAB file.
--
Brian Tillman