Have you ever come across Email file formats and failed to open it? You have come to the right place, we are going to explain what Email file formats are and what are the recommended software that can open or use them. Email file formats are used by email applications to store their various data including email messages, attachments, folders, address books etc. Email file formats are mainly associated with Outlook Express Email Message file. Additional types of files may also be using the Email file extension. There are several common file types used with regards to email.  Below is the list of the most popular file formats used by various email clients to store e-mail messages and other related data.

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Open Source APIs for Email Files

Check out the list of Open Source APIs to read and write Email File Formats.

List of Email File Extensions and Associated File Formats

Following is a list of popular email file types along with their associated extensions.