Email Archiving via Quoted Content Deduplication

The patent segments email messages into distinct components: original content, quoted content, and reply content. By identifying and separating quoted content (typically enclosed in quotation marks or indentation), the system can apply deduplication specifically to these segments. This segmentation allows the system to recognize that quoted content in one email may be identical to content in another email, enabling effective deduplication while preserving the email thread structure and context.

The patent implements a copying mechanism where quoted content is extracted from emails and stored as separate, deduplicated data objects. Instead of storing redundant copies of quoted content in each email, the system creates a single master copy and maintains references or links from multiple emails to this master copy. This copying approach reduces storage requirements while preserving the ability to retrieve and display the complete email content with proper attribution of quoted material.

The patent introduces an intermediary component (a content index or reference resolution system) that manages the mapping between email references and actual content objects. When an email is retrieved, this intermediary automatically resolves references to quoted content, fetching the appropriate content objects and assembling the complete email display. This intermediary layer shields users from the underlying complexity, providing seamless retrieval of full email content while maintaining storage efficiency through reference-based storage.