Mailman Gem

Is there a way to receive email from multiple accounts in mailman gem? Here is my mailman_server.rb which processes mail from a single account

require "rubygems"
require "mailman"

Mailman.config.pop3 = {
   server: '', port: 995, ssl: true,
   username: "",
   password: "password"
} do
default do
  puts message.subject

I want to receive mails from both and which I can then process. Is there a way I can open multiple accounts in a single process of mailman?