File extension .BU
Full Name | Developer | Category |
---|---|---|
Pegasus Mail Temporary | David Harris | Various Files |
BU (Pegasus Mail Temporary) is a file extension associated with Pegasus Mail, a leading email software application developed by David Harris. It is used to store temporary data and preferences for .PMN window session files. It can also be used to create backup copies of emails and other data as the user navigates his or her way through their email service.
BU files contain source information, settings, and preferences compiled while the user is using their Pegasus Mail software. They are stored as plain text files which can be manually edited and customized inside any text editing application. Though being part of the same family, BU file extensions do not correspond to other Pegasus Mail files such as .PMM, .PMI, and .PMR. The size of the BU file depends upon the data stored in it at the time of creation.
Opening an BU File Type
In order to open BU files, users need to have Pegasus Mail 4.73 or later versions, the Windows-based email platform developed by Harris. It is one of the best performing email services allowing users to read multiple emails from one window. Alternatively, users can open BU files using a text editor such as Notepad or Wordpad on Windows based machines or TextEdit for Mac OS.
Similar File Extensions
Programs for WINDOWS system
After installing the required software, the operating system will usually automatically associate an unknown file type (in this case .BU) with the new application. If this does not happen, we can help the system a bit by selecting the software for it, which it should always use to open files with the .BU extension.
When choosing the software we can select the system to use this software every time.
Remember!
Using it for the first time it is good to check whether the .BU file opened in the application can be read by us and opens in a way that allows us to use it. If everything is in order, select this option the next time you open a file with the .BU extension. However, if the file has not opened correctly, we have to look for a different software, with which we can open files with the .BU extension. Select a different software from our list and install it on your computer. After the software is installed, repeat inspection openings of a .BU file. Sometimes you have to repeat the operation several times.
Other instructions
If none of the programs listed by us to work with the .BU file has not meet your expectations, you can try searching other websites. But remember to avoid downloading programs "that can open any file". These applications not only have very limited functionality, but may also expose you to expense tens of dollars when purchasing a license.
In the vast majority of cases you will find the program dedicated to support the .BU file, or any other file format. In addition, there is a chance that it will be a free program, and its functionality (concerning the .BU file) will be extended to the maximum.
It is also good to check
- if the .BU file has no errors
- or if it has been copied (or downloaded by the browser) thoroughly
Author’s guidelines

Mr B. Adam
Author of the guidelines / Founder of FileExtension.info
New technologies enthusiast, helping to solve problems with the files.
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