Maildir or Mbox files (if this was a seda email archive).
Here is a helpful post on how to handle, extract, and understand the contents of such a file. 1. What is this file? seda@internet.ir.tgz
seda@internet.ir likely represents a user ( seda ) or service on a specific server ( internet.ir ). 2. How to Extract (Unzip) the File On Linux or macOS Open your terminal and use the following command: tar -xzvf seda@internet.ir.tgz Use code with caution. Copied to clipboard -x : Extract files. -z : Uncompress (gzip). -v : Verbose (show files as they extract). -f : Use the following filename. On Windows 7-Zip : Right-click the file -> 7-Zip -> Extract Here. WinRAR: Right-click the file -> Extract here. 3. What to Do After Extraction Once extracted, you will likely find a folder containing: Maildir or Mbox files (if this was a seda email archive)