In trying to hide email addresses of members from others, we send messages
to our organization with the members all listed in BCC. We have done this
using Outlook 2003 for a large number of members (in excess of 200) until
recently when the process stopped working. Everything appears to be normal
inasmuch as the email appears in the Sent folder, but the member do not
receive the email. There are no error messages from anyone.

In an effort to troubleshoot the problem, we sent an email to ourselves and
listed us in CC and BCC. Using either Outlook Express or Outlook 2000 we
get three messages back. Using Outlook 2003, we only get one message back.
We therefore thought that something may have changed in recent updates to
Windows XP that caused Outlook 2003 to no longer operate as it used to. Not
wanting to lose the features of Outlook, we then upgraded to Outlook 2007,
and it works in the same way as Outlook 2003. In other words, it doesn't do
the job.

We have now gone all the way back to Outlook Express, and it works just
fine. All the named members in BCC receive their emails. The tech people
at the email server have no suggestions as to what the problem might be.

Does anyone have any idea as to what is going on? Are there differences in
the information that is sent to the server from Outlook Express versus that
which is sent from Outlook 2003 and 2007?

Thanks for your time,
Dan