The most efficient method of converting MSG files to PDF is by using a trustworthy conversion tool. WholeClear MSG to PDF Converter is one such conversion tool that allows users to import their MSG files and convert them to PDF format while preserving the email content attachments and formatting, as well as allowing users to convert multiple MSG files at a time. You can want to check the free trial version before purchasing the full version, as there is a limit on how many .msg files can be converted.