Email Threads and End of Branch Email
Email threads are running email communications with succeeding replies or forwards. Email threads with end of branch emails are detected through content analysis.
When you look at a thread, a red box to the left of a document title indicates the document is an end of branch email, i.e., it is content-inclusive of earlier emails in the thread.
An email thread may contain multiple end of branch emails. This means the thread split off at some point in the conversation. The example below depicts this type of scenario.
Thread with Duplicates and Multiple End of Branch Emails
Grayed out Attachments in Threads
If an attachment is grayed out and preceded by a small icon 
, the attachment is either the duplicate of another attachment in the thread or it is the duplicate of another document that is not linked to the thread.
Example
The sender of an email has stored a document on the file system and then added it as attachment to an email. If both are loaded into Axcelerate 5, the file system document is not part of the email, but it is still detected as a duplicate of the email attachment.
Any Attachments in Threads
Important: Attachments to any email in a thread should be reviewed to make a decision about the thread as a whole. Threading technology considers the content of the emails, not the attachments. It is always possible that different attachments were added or dropped as the chain evolved. In Associated Results view, an email with an attachment is flagged with a paperclip icon; click this icon and the family expands to display the attachments in the list.
Thread with attachment
Caution: Currently the BCC field of an email is not taken into account during end of branch detection, i.e., an email with a BCC may not have an end of branch red box indicator. To ensure BCC emails receive proper review, use the Communication > BCC Smart Filter to determine whether any BCC emails exist in your review batch or results set.