After installing McAfee VirusScan Enterprise8.0i, Foxmail cannot send emails because McAfee VirusScan Enterprise defaults to close the 25-port. This problem is easy to solve, you only need to write the program that you don't want to block McAfee VirusScan Enterprise's "White List". The specific operation is this: first open the console, click on access protection, edit "Forbidden to send a large number of send mail", add f oxmail.exe in the troubled process.