Which emails are typically never tagged as duplicate spares?

Emails with blank attachments are typically never tagged as duplicate spares because the essential content that could potentially identify them as duplicates—meaningful data or context within the attachments—is absent. Duplicate spares are often identified based on similar content or attachments between emails. When attachments are blank, they do not present the necessary criteria for comparison, which is usually focused on the informative substance of the email.

In contrast, emails with differing dates or those sent to different recipients may still have similar content and, therefore, can be flagged as duplicates because the primary body content remains unchanged. Emails with larger body text might also contain similarities that allow them to be considered duplicates, depending on how that information aligns with other emails in the system. Therefore, the presence of blank attachments leads to a clear distinction, making such emails less likely to be tagged as duplicates.