Multiple recipients causes multiple copies fto be received

Exchange 2003 SP1
SBS2003 SP1

When one of my clients sent an email yesterday to about 35 people, all 35 people recived 35 copies.

When I check the headers, each subsequent copy is not coming from the originator but from one of the recipients. So, we end up with 35 copies of the original message being delivered to each recipient _except_ the person who sent it, who just gets 35 irate phone calls!

Any ideas?
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quadraspleenAsked:
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SembeeConnect With a Mentor Commented:
SBS has a POP3 connector for collecting email from ISPs email servers via POP3. There was a bug in a certain version of SBS where it caused these sorts of loops. I am not 100% sure when it was fixed, but if the server is fully up to date (Windows 2003 SP1, SBS SP1 and Exchange 2003 SP2) then the problem is fixed.

Simon.
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SembeeCommented:
There is probably a POP3 connector involved somewhere - probably the recipient who looped the email.

Any reason you haven't gone to Exchange 2003 Sp2 on your own server?

Simon.
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quadraspleenAuthor Commented:
Thanks for the reply, Simon.

What do you mean by a POP3 connector somewhere? What could it be doing? How do we stop it doing whatever it is doing?!

My server is SP2; the clients server is being upgraded as we speak.

Thanks,

jake
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quadraspleenAuthor Commented:
Thanks for the reply.

I know what the POP3 connector does, I meant what could it be doing to cause this?

Neither myself nor my customer was or is using a POP2 connector anyway, so it must be one of the recipients. I'll send out a mail to them all to update.

Thanks
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