Email (Satellite Systems)

Due : October 9, 2009

Assignment: 
Extend the email system to work with satellite systems. At this point in the semester, there should be at least two satellite systems. These are the two DNS servers.

Requirements: 

• Configure the systems in your local network to relay all email through the MTA system.
• Update the MTA to relay email for the satellites and to receive email for them.
• Create a user account for passoff.

Configure the systems in your local network to relay all email through the MTA system: 

• On each existing system, configure the exim4 software to use your MTA as a smarthost.
• On each existing system, the MUAs mailx and mutt should be installed.

Update the MTA to relay email for the satellites and to receive email for them: 

• Configure the system to act as the incoming MTA for the satellites in the domain: 
  

  • The server should accept email for users at any of the hosts in your domain. (e.g. user@mybox.example.com)
  • The DNS should be configured to direct email for all hosts in your domain to the MTA system.

• Configure the system to act as the outgoing MTA for the local network: 
  

  • The server should relay email for users at any of the satellite hosts in your domain. (e.g. Email from user@mybox.example.com should be relayed to its destination.)

Create a user account for passoff: 

• Create a new user account on the satellite systems. This should be the same username and password as the account created on the MTA in the previous assignment.

Pass-off Procedure: 

• Using the CIT submission system, submit a file to IT3100, SMTP Satellite.
• The file should be named smtp_info.txt. This file must be a plain text file, with the following format:

  mta: ip_address_of_MTA
  user: user_name_created_for_passoff
  pass: password_for_user
  host: name.of.mta.machine
  hosts: ip_address_of_satellite_host1, ip_address_of_satellite_host2
  domain: name.of.domain
  

  For example, a file may look like this:

  mta: 144.38.212.50
  user: bonzai
  pass: $&^bbi13
  host: mail.horgoth.com
  hosts: 144.38.212.48, 144.38.212.49
  domain: horgoth.com
  

• Each of ip addresses in the hosts list must have a valid reverse DNS entry!
• Several email messages will be sent to the user at each of the hosts listed.
• Several email messages will be sent from the user at each of the hosts listed.
• Email messages that are not correctly delivered will cause points to be deducted from the assignment.