From Digital Confidence:
ConfidentSend is the most comprehensive, user friendly and fast solution for removing hidden data & metadata from email attachments.
Hidden data stored in many popular file types may contain confidential and private information that when exposed can cause you and your organization embarrassment with possible financial and legal implications.
ConfidentSend can remove hidden data from Microsoft Office documents (Word, Excel, PowerPoint), OpenOffice documents, PDF documents, and popular image and media file types such as JPEG, PNG, and SVG. ConfidentSend can remove hidden data from files even if they are compressed within ZIP files.
ConfidentSend seamlessly integrates with Microsoft Outlook or with Mozilla Thunderbird e-mail clients, inspects and cleans the attachments of each and every outgoing e-mail. ConfidentSend also warns the user when sensitive content is found in the email message and its attachments.
Version 5.0 incorporates the latest version of the DataDistiller Engine with support for five additional file formats. The new version also includes usability improvements, and three bug fixes. Microsoft .NET Framework 4.0 is required for ConfidentSend 5.