I have received one email, but that's it. My teacher had said that he had issues sending a email to it...
# Lists of ports in the following comma separated lists can be added using a
# colon (e.g. 30000:35000).
# Allow incoming TCP ports
TCP_IN = "20,21,25,53,80,110,143,443,465,953,993,995,2077,2078,2082,2083,2086,2087,2095,2096,3385"
# Allow outgoing TCP ports
TCP_OUT = "20,21,25,37,43,53,80,110,113,443,587,873,953,2087,2089,2703,3385"
# Allow incoming UDP ports
UDP_IN = "20,21,53,953,7777,8767,14003,27950,27960,27961"
# Allow outgoing UDP ports
# To allow outgoing traceroute add 33434:33523 to this list
UDP_OUT = "20,21,53,113,123,873,953,6277,7777,8767,14003,24340,27950,27960,27961,33434:33523"