Line 6 Error in mailproxy.py

[cluelessnyc]

I'm receiving the following error. Any insight to fix would be appreciated?

(base) PS C:\Mailproxy> python mailproxy.py
File "mailproxy.py", line 6

^
SyntaxError: invalid syntax

[kz26]

There should not be any syntax issues in the file that I am aware of. What version of Python are you using?