How to check user agent in mails

There are a few ways to check the User Agent (UA) in emails:

Method 1: Using the email client's built-in features

  1. Open the email client (e.g., Gmail, Outlook, Yahoo Mail) and select the email you want to check.
  2. Look for the "View" or "Details" menu and click on it.
  3. In the menu, look for an option like "Headers" or "Message Headers" and click on it.
  4. In the headers section, look for the "User-Agent" header. It should be listed as a string, e.g., "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3".

Method 2: Using a third-party email client extension

  1. Install a third-party email client extension that allows you to view email headers, such as:
    • Gmail's "Email Header Analyzer" extension
    • Outlook's "Header Analyzer" add-in
    • Thunderbird's "Header Viewer" extension
  2. Follow the extension's instructions to enable it and view the email headers.
  3. Look for the "User-Agent" header in the headers section.

Method 3: Using a command-line tool

  1. Use a command-line tool like curl or wget to fetch the email headers.
  2. Use the -I or --header option to specify the email address and retrieve the headers.
  3. Look for the "User-Agent" header in the output.

Example using curl:

curl -I -H "Host: example.com" "https://example.com/emails/12345"

This will retrieve the headers for the email with ID 12345 and display them in the terminal. Look for the "User-Agent" header in the output.

Method 4: Using a web-based email header analyzer

  1. Use a web-based email header analyzer tool, such as:
    • Email Header Analyzer (eha.io)
    • Header Analyzer (header-analyzer.com)
    • Email Header Viewer (email-header-viewer.com)
  2. Enter the email address and retrieve the headers.
  3. Look for the "User-Agent" header in the output.

Remember that the User Agent header may be spoofed or modified by the sender, so it's not always a reliable way to identify the client.