DeadmanDAO Mail Server

Host Machine

Create Instance

Interserver Web Interface

1. go to interserver
2. create an instance
   1. Single Slice ($6/mo at this time)
   2. Debian 9 (Deb 9 has Mailman 2, Deb 10 has Mailman 3)
   3. KVM
3. set reverse DNS to diffie.deadmandao.com
4. Note the IP address

Update to Latest

Log in root@ip.address using password you provided

apt-get update
apt-get -y upgrade
apt-get -y dist-upgrade # if needed
reboot

Add User Account

Log in root@ip.address

apt-get -y install sudo
adduser bob
usermod -G sudo bob
exit

Host MX Settings

Log in to bob@ip.address

Set SPF

sudo apt-get install net-tools
sudo ifconfig

That'll give you the ip4 and ip6 addresses, which go into the DNS text record:

• v=spf1 ip4:66.23.226.216 ip6:fe80::216:3eff:fe24:10e1 -all

Set Other DNS

• A Record, diffie, 66.23.226.216
• A Record, @, 66.23.226.216
• CNAME Record, www, diffie.deadmandao.com
• CNAME Record, mail, diffie.deadmandao.com
• TXT Record, diffe, v=spf1 ip4:66.23.226.216 ip6:fe80::216:3eff:fe24:10e1 -all
• MX Record, deadmandao.com, mail.deadmandao.com, 10

Set Hostname

sudo apt-get install emacs-nox
sudo emacs -nw /etc/hostname
> diffie
sudo emacs -nw /etc/hosts
> 66.23.226.216	diffie.deadmandao.com diffie
sudo reboot

Log in to bob@diffie.deadmandao.com

hostname
hostname --all-fqdn
dnsdomainname

Postfix

SMTP Server

sudo apt-get install postfix

• Internet Site
• deadmandao.com is the host domain
• send a test email

echo "Subject: sendmail test" | /usr/sbin/sendmail -v emailaddress

Had trouble with IPv6 in Debian 9 ("Network is unreachable"). Used the following in main.cf to switch to IPv4 only.

# inet_protocols = all
inet_protocols = ipv4

Mailman Install

DeadmanDAO_Mailman_Attempt

Client-Side

GMail

• https://www.digitalocean.com/community/questions/using-gmail-with-postfix-smtp-server