4. The method of claim 3 , further comprising determining that an email in the machine-generated emails is part of an email thread based on the template causality graph for the email template.
4. The method of claim 3 , further comprising determining that an email in the machine-generated emails is part of an email thread based on the template causality graph for the email template. 5. The method of claim 4 , further comprising analyzing a time difference between the email and other emails in the email thread.