When hitting the reply button, the original message and corresponding replies are automatically quoted. When reading an email, also take a few minutes to read each threaded message. Previous messages and replies often contain vital information that you need to know before sending your response. Know the individual stakeholders within each email conversation. Their responses are likely to inform your interaction within a discussion.
Also, be sure to go through any attachments that are included in previous emails. Attached word documents, spreadsheets, and infographics go a long way to convey important data and information in any email conversation.