.att file extension
- Email attachment.
A .att file represents an email attachment file, possibly generated by a web-mail program.
The file extension .att seems to be used in place of the correct file extension. Try opening in notepad, or rename to the expected file extension and then try opening it.
Can you add to this? Do you know of any applications not already listed which will work with .att files, view .att files or open .att files? Are you able to contribute any additional reference information or file format information about .att files or have you spotted any errors or omissions? If so please let us know by emailing us at firstname.lastname@example.org - Thank you.