Accept only "smtp.gmail.com" and "pop.gmail.com", how i could do that?

["Manuel Gómez" <mgdpz1@gmail.com>]

Hi, i would like accept only smtps and pop3s on my OS and i only want to know how accept "smtp.gmail.com" and "pop.gmail.com" in my icedove.

I allow the IPs (pop.gmail.com, smtp,gmail.com) but the connection doesn't works, what i could allow? I know how to use my firewall (it works allowing all smtps and pop3s connections), so i would like to learn how allow specifically these connections.

Thank you very much, I appreciate your help. I need help, so i have posted in several mailing lists, i just wish that i could be forgiven.