The EMLX file format is implemented and developed by Apple. The Apple Mail application uses the EMLX file format for exporting the emails. Learn more about this file format here.
The Internet Calendaring and Scheduling Core Object Specification (iCalendar) is an internet standard (RFC 2445) for exchanging and deploying calendaring events and scheduling. Learn more about this file format here.
MSG is a file format used by Microsoft Outlook and Exchange to store email messages, contact, appointment, or other tasks. Learn more about this file format here.
Offline Storage Table (OST) file represents user’s mailbox data in offline mode on local machine upon registration with Exchange Server using Microsoft Outlook. Learn more about this file format here.
Files with .pst extension represent Outlook Personal Storage Files (also called Personal Storage Table) that store variety of user information. Learn more about this file format here.
Transport Neutral Encapsulation Format (TNEF) is a Microsoft proprietary format for encapsulating email attachments based on Messaging Application Programming Interface (MAPI). Learn more about this file format here.