Which services are being used by Messenger !?

[Nuno Carvalho <nemanuel@student.dei.uc.pt>]

Hi,

  I'm configuring my firewall with ipchains and when I try to send some
mail to my POP3 server using Netscape Messenger it takes too much time
(slow).
  Does anyone knows which services are needed !? I'm configuring with
pop-3 and smtp services. Would be enough !? Is there anyone ? Probably
pop-3 service would be suficient, rigth ?

 Thanks in advance.

 Best regards,
    Nuno Carvalho