To convert bulk items from EML files to PST, you can use the Aryson EML to PST Converter, which provides an automated and efficient solution. This tool allows you to import multiple EML files simultaneously and export them directly into a single or multiple Outlook PST files without any data loss. It maintains the original folder structure, email formatting, attachments, and metadata, ensuring a smooth migration to MS Outlook. The software also supports batch conversion, making it ideal for handling large volumes of emails quickly and securely.