Unexpected attachments appear in incoming email

I'm running Windows 2002, and just this morning -- for no reason I can figure out -- I began to find that nearly all of my incoming emails included attachments which contained the complete text of the message. If I send myself an email with no attachment, the email comes back into my inbox with an attachment added (containin the text of the message). Most -- though not all -- emails sent to me by other addresses also have attachments mysteriously added. If I cc myself on a message to someone else, I sometimes get the cc'ed copy back without an attachment, and sometimes the attachment appears.

I've been over all of the help materials in search of a way to turn this "feature" off and not have these attachments added to my email, and I can't find anything. I also can't figure out what I could have done to cause this: the only unusual thing that happened this morning was that Outlook asked to perform an automatc archiving, which I let it do. But I've no idea how that could have caused this.

Can anyone help?

Thanks!
Alan

 

If you have AVG anti-virus installed, they have recently updated their software, and this is the effect. The only way to stop it is to disable email filtering.

 

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