If you are running Mac® OS X, you can use the Network Utility application, which is included with Mac OS X, to run the trace route.

1. Launch Network Utility.

   Note: You can do this through Mac OS X Spotlight by typing Network Utility, and then clicking the Top Hit.

2. Click Traceroute.
   
3. Enter the domain name for which you want to perform a traceroute. For example: email.coolexample.com
4. Click Trace.
5. Select the results, and then right-click and select Copy or press COMMAND+C to copy the text.
6. Paste the text into a text editor (TextEdit, etc.) and save the file.

More info

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