Admin instructions mail server

Mail Server Documentation

Basic configuration of server should follow the standard class server, see lab 1

1. Power on you Virtual machine
2. Install Debian Linux
• Set the domain name to itc2480.campus.ihitc.net
3. Create a new user account ping using the adduser program

adduser ping

4. Use the links browser or wget to download the DEB package file from www.webmin.com

NOTE: Because this DEB file was downloaded directly instead of automatically by APT from a package repository the installation command is slightly different and some other commands such as apt show will not work.

5. Install the package with apt install

   apt install ./<filename.deb>

   Don't forget that installation of software must be done with system administrator permissions.


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6. Set a static IP for your server
7. Apply your static IP address

Auto Reply Configuration

1. Install vacation

Vacation is a Linux package that will auto-respond to received emails for the receiving users.

sudo apt install vacation
2. Run the vacation program in the profile you wish to set up the reply message from
vacation
3. Follow the prompts, for now reply with the default answer (Y)



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4. Edit the vacation.msg file
nano vacation.msg



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• Enter the message that you would like to have in the auto-response.

5. Set the response to auto mail every message

The default response is every one week to send an auto-reply, for our use it is important to reply to every email.

vacation -i -r 0

NOTE: It is important to understand this command sets the auto-reply delay. Using the -r 0 sets the vacation program to reply to EVERY message it receives. In a production environment, this is not recommended as it can create mail loops.

6. Test your reply message from the CLI mailutils package or the MTA chosen to use on client computers

Auto Maildir Clean Up

1. Create script to delete emails older than 45 days

NOTE: The script must be owned by root and executable. Additionally, the crontab must be created with sudo priviledges

sudo nano <scriptname.sh>

#!/bin/bash
find /home/testuser/Maildir/cur -type f -mtime +45  -exec rm {} \;
find /home/testuser/Maildir/new -type f -mtime +45  -exec rm {} \;
find /home/testuser/Maildir/tmp -type f -mtime +45  -exec rm {} \;



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2. Make executable

sudo chmod +x <sciptname.sh>

3. Create a crontab job

sudo crontab -e

NOTE: the astricks at the start of the following command are respective to the scheduling of time. A good additional resource for cron can be found at Vitux. Each astrik represents [Minute] [hour] [Day_of_the_Month] [Month_of_the_Year] [Day_of_the_Week]

• Add the following line to the chrontab file to schedule the job at 8PM every day.

* 20 * * * * /home/ping/scriptname.sh