When you attempt to send an email through Yahoo with a text attachment. Instead of sending the email, the File progress bar continues to cycle. Yahoo does not timeout, and the browser does not display a blocking page from Symantec Web Gateway (SWG) appliance.
See below Solution for screen shot of Yahoo progress bar in continuous cycle.
If the Custom Reports are checked, an entry showing a Policy related block appears. See below Solution for screen shot example of such events.
Symantec reproduced this behavior in a test lab environment.
Symantec continues to investigate.
Product manuals and guides for Symantec Web Gateway 5.0.x are located here: