MarsEdit communicates with your blog server using a kind of specialized language called an "API". The communication consists of requests to the server by MarsEdit, and the server's responses to those requests.
To view the content of this communication, choose Network Log from the Window menu.
You can clear the log by clicking the Clear button, or save the contents to a file by clicking the Save to File button.
The text does not include your password, but does include the URL of your blog and the contents of your posts. The contents of the log are cleared every time you quit MarsEdit.
Why view the traffic?
Examining the contents of this log may help in debugging server problems.
If you need to contact Red Sweater for support, it can be helpful to include a copy of the network log contents. To do this, save the text to a file (by clicking Save to File) and include the file as an email attachment.