File Extension Search

.mbox File Extension

Developer: N/A
File type: E-Mailbox File
You're here because you have a file that has a file extension ending in .mbox. Files with the file extension .mbox can only be launched by certain applications. It's possible that .mbox files are data files rather than documents or media, which means they're not meant to be viewed at all.

what is a .mbox file?

The MBOX file extension was developed for an E-mail Mailbox File that is used in organizing messages sent and received as emails. Normally considered as a generic term, electronic messages are stored and consolidated in a single file as plain text. MBOX is a file format that represents encoded information intended for storage in a computer file. It shows how bits are used as medium for digital storage and maybe free or proprietary. There are file formats that are used for special types of data like PNG which stores bitmapped images using data compression algorithms called LOSSLESS data compression. These images are reconstructed compressed data copied exactly from the original data. There are also other formats that use another form of compression called LOSSY compression. This type compresses images by eliminating unnecessary information called bits, thereby allowing the file to be smaller in size. Examples of these are TIFF (Tagged Image File Format), MNG (Multiple-image Network Graphics), GZIP (Unix Tool) and ZIP file formats. Similar compression technology is implemented into the consolidation of multiple email messages into MBOX files.

how to open a .mbox file?

Launch a .mbox file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .mbox file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .mbox files aren't yet associated with it. In this case, when you try to open a .mbox file, you can tell Windows which application is the correct one for that file. From then on, opening a  .mbox file will open the correct application. Click here to fix .mbox file association errors

applications that open a .mbox file

Mozilla Thunderbird

Mozilla Thunderbird

Thunderbird is a free, open source email, newsgroup, news feed and chat (XMPP, IRC, Twitter) client created by the Mozilla Foundation. The project stratagem is modeled after Mozilla Firefox, a project aimed at generating a Web browser. The vanilla version is not a personal information manager, although the Mozilla Lightning extension adds PIM functionality. Additional features, if desired, are often available thru other extensions. It supports UNIX mailbox format (mbox), Mork which is utilized for internal database and SQLite also used for internal database (since version 3). Files that bear the .p7s extension are email messages utilized in email managing programs for sending, receiving or just simply viewing protected emails encrypted with digital signatures. Some of these email management applications include Microsoft Outlook 2010, PostBox and Mozilla Thunderbird. These files contain information as well as the source of the email and whether the email has been edited or modified during transmission, which means users with these email management applications incorporated with P7S support can make sure that the emails they receive are genuine, are originating from trusted senders and are not tampered with, before they open and view the emails.
Nokisoft Noki

Nokisoft Noki

Noki is a commercial service to discover and extract Phone book, SMS, Calendar, Memo, Bookmark and other user files from the backup file of Nokia phone (created using Nokia PC Suite or Nokia Ovi Suite). It gives several ways to restore info from the backup file: contacts can be exported as vCard (.vcf file) and then copied to mobile phones via Nokia PC Suite, or they can be changed to a .csv file for transport to Mozilla Thunderbird, Microsoft Outlook or Outlook Express; text messages, MBOX email files and SMS can be exported to vMessage (.vmg file) format; calendar items can be saved into vCalendar format; memos and notes can be saved as .txt files; media files, which remain in their own format, can be extracted; the supported Nokia backup file formats are: .nbu, .nfb, .nfc, .arc, .cdb. Noki Software was developed by Han Zhao, released on May 3, 2007 and works in Windows operating system.
QUALCOMM Eudora for Mac

QUALCOMM Eudora for Mac

Qualcomm, the developer of Eudora (an email client), has continued improving the software that the company cooperated with Mozilla on the project Penelope. This is the also known as the Eudora version 8. The latest version works for MAC operating system (Mac OS X 10.4). If users are operating with 10.5 Leopard, configuring the sound setting of Eudora is a must whether what version of Eudora it is for this OS does not support the audio alerts of the software to avoid complications. It has a customized toolkit dialog that users can resize wherein the recipient tab is present. Filters auto naming of junk and attachments. Also, Eudora has an automatic reply to function and easier searching capabilities of emails. Eudora’s security system can support S/MIME authentication, in windows and SSL. This software can support these following email protocols: SMTP, POP3 and IMAP. To make Eudora work these minimum system requirements should be comply: 256 MB of RAM, 200 MB Hard disk drive space and PowerPC G3, G4, G5 or Intelx86 processor.


Eudora is an email base client that works with IMAP, SMTP and POP3 protocols. S/MIME authentication, SSL and in Windows are supported as well for security processes. Qualcomm is the developer of this software since 1991. This has a webmail version that is but creation of new accounts is not allowed anymore. In order to have Eudora in the users system it must be running with Mac OS X or Windows operating system. The Eudora version 8 is able to run for windows win2000, winxp, win2003, winvista, win7, Linux Kernel, MAC OS X 10.4 and older versions unlike version 7. The system should have the following necessities stated: (windows) 786 MB RAM or 256 MB (win2000), 52 MB HDD and Pentium 233 MHz processor (Macintosh) PowerPC G3, G4 or G5 processor, 200 MB HDD, and 256 MB RAM (Linux) 64 MB RAM, 52 MB HDD and Intel Pentium II and AMD K6 III 233 MHz processor. Eudora has improved some of its features such as the alert sounds, easy to find users interface and platform base on Thunderbird from Mozilla.
QUALCOMM Eudora for Microsoft Windows

QUALCOMM Eudora for Microsoft Windows

Almost all Eudora email client versions can work on computers that run on windows operating systems (a few older versions of Eudora do not have compatibility support for Windows Vista and Windows 7). The minimum system requirements needed to enable users to utilize Eudora are 786MB RAM or win2000 256MB, Pentium 233 MHz processor and 52 MB Hard Disk Drive space. This email client supports POP3, IMAP and SMTP protocols that are secured by SSL and S/MIME authentication every time users access emails using the software. Eudora more organized compare to Microsoft outlook that is bundled in all windows operating system. It has advance features such as drop and drag, easy search, save and restore functions and more. It has various sound alerts to inform users about new emails and comprehensive spam email filtering. The latest version of Eudora has the code name Penelope that is version 8. Qualcomm, Eudora’s developer have merged with Mozilla and created this version that can communicate with Mozilla Thurderbird.

a word of warning

Be careful not to rename the extension on .mbox files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

what is a file extension?

A file extension is the set of three or four characters at the end of a filename; in this case, .mbox. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.

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