One common issue while sending emails is when they keep bouncing back. The non-delivery report mentions the error as the presence of an illegal attachment. This problem does not resolve itself by simply trying to send the email again.
BMP Wrap hides files as BMP images
While the concept of converting files to BMP images is not new, and many software programs could help with the same, BMP Wrap has a couple of surplus features that make it a better bet. It is one of the easiest to use. As a single 20KB file, it has no GUI. There is no installation. Download the .exe file from their website and convert your attachment files.
How to use BMP Wrap
- Let us assume the BMP Wrap application which is a .exe file and the file to be converted are in the same folder.
- We drag the target file on BMP Wrap’s icon.
- The BMP image file would be created with .bmp extension.
- The BMP image file can be mailed to the intended recipient and converted to the original file by dragging on BMP Wrap. A BMP conversion software could be used at the receiver’s end as well.
- After doing so, the recipient gets the original file in the original format.
Other than hiding files inside BMP image files, converting files for allowing them to be sent as email attachments, the software is also used to encrypt files. The .bmp format file looks somewhat like an image after conversion. It cannot be used without re-conversion. Though not an ideal encryption software, it works well in hiding data from amateurs while transferring in USB drives.
On why .bmp files are secure, let us suppose you change your file format to a .zip file before mailing. Any non-intended recipient could easily recover it by simply changing the extension of the file. On the contrary, you cannot convert a .bmp file back to the original file by simply changing the extension. Attempting to do so makes the file useless. The images created by BMP Wrap can be opened using any graphic editor but don’t give much of information.
I would not call this a complete steganography app because it does not hide the cover, and it is not difficult to recover the data for anyone with sufficient technical knowledge, but it is easier to use than the other options.
The software can be downloaded from here. The application is light and quick. No installation is needed. The conversion needs less than a second.
What is an illegal attachment in emails?
Microsoft, Google, and several others have banned sending files in a few formats, particularly due to their high potential for abuse. This is quite common with executable files. The typical solution to this problem is to rename the file to a different extension and format and inform the recipient so it can be converted back to the original format. However, converting a file and re-converting it at the recipient’s end is annoying.
Hide a file inside a .BMP image
Another way of doing the job is to convert these files into BMP image files using a third-party tool called BMP Wrap which makes the job quick. BMP Wrap temporarily hides a file inside a valid .BMP image.
Can you email a BMP file?
Yes, you can email a BMP file using almost any email client. Whether it is Outlook for Desktop or Web, you can use this email client to send a BMP file to anybody. The recipient can open the attachment like any other file on their Windows 11/10 PCs as it is an image file.
Is BMP a file extension for a picture file?
Yes, BMP is a file extension for a picture file. BMP stands for Bitmap Image file, which is very common on Windows 11, Windows 10, and other versions. Using Paint and other image editing apps, you can convert any standard image format, such as PNG, JPEG, etc., to BMP.
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