Editing Email (section)

===Filename extensions===
Upon reception of email messages, email client applications save messages in operating system files in the file system. Some clients save individual messages as separate files, while others use various database formats, often proprietary, for collective storage. A historical standard of storage is the ''mbox'' format. The specific format used is often indicated by special [[filename extension]]s:
;<code>eml</code>
:Used by many email clients including [[Novell GroupWise]], [[Microsoft Outlook Express]], [[Lotus notes]], [[Windows Mail]], [[Mozilla Thunderbird]], and Postbox. The files contain the email contents as [[plain text]] in [[MIME]] format, containing the email header and body, including attachments in one or more of several formats.
;<code>emlx</code>
:Used by [[Apple Mail]].
;<code>msg</code>
:Used by [[Microsoft Outlook|Microsoft Office Outlook]] and [[OfficeLogic|OfficeLogic Groupware]].
;<code>mbx</code>
:Used by Opera Mail, [[KMail]], and [[Apple Mail]] based on the mbox format.

Some applications (like [[Apple Mail]]) leave attachments encoded in messages for searching while also saving separate copies of the attachments. Others separate attachments from messages and save them in a specific directory.