I am writing to share the following [document/spreadsheet/presentation/folder] with you for your review. This contains [brief description of contents, e.g., the Q3 marketing strategy / project deliverables / meeting notes].

[Your Name/Team Name]

Below are full-content templates for the most common scenarios.

Hi [Recipient Name],

Best regards, [Your Name] [Your Title / Contact Info]

[Your Name] [Your Title]