My cheater script to install docker-mailserver as fast as possible with letsencrypt, includes dns setup instructions

[shodanx2]

Hello,

I had quite a struggle setting up docker-mailserver with working encryption

I didn't want to have this struggle again when I have forgotten all of this but need to install another mailserver

So I made myself a cheater script, meant to work off a fresh install of ubuntu 22 but it probably works on anything that can run docker and certbot

docker-mailserver quick install script
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DNS setup

Create A record to mydomainhere.com and mail.mydomainhere.com content is ip address of mail server
Create MX record to mydomainhere.com content 10:mail.mydomainhere.com
Create TXT record to mydomainhere.com content "v=spf1 a mx ip4:1.2.3.4 ~all"  where 1.2.3.4 is the IP address of mydomainhere.com
Create TXT record to _dmarc.mydomainhere.com content "v=DMARC1; p=none" 
Create TXT record to mail._domainkey.mydomainhere.com content "v=DKIM1; h=sha256; k=rsa; " "p=MII Update this with your dkim keys BzC2y3" "BP044 [...] nGl6RKr//" "jsMe4w6B [...] wEAAQ=="

If behind a router, forward ports 25,143,465,587,993,995 to your mail server
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nano serversetup.sh
chmod +x serversetup.sh
./serversetup.sh

nano mailserverinstallscript.sh
chmod +x mailserverinstallscript.sh
./mailserverinstallscript.sh
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serversetup.sh   edit authkey and your timezone
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authkey="ssh-rsa AAAAB3NzaPutty private key hereiCvUuTt rsa-key-20220825"
mkdir /root/.ssh
history -c
echo $authkey >> /root/.ssh/authorized_keys
timedatectl set-timezone America/Montreal
export DEBIAN_FRONTEND=noninteractive
apt update ; apt upgrade -yq ; apt install -yq docker-compose certbot 
reboot
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mailserverinstallscript.sh   You only need to edit the first group of variables
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#!/bin/bash
mydomain=mydomainhere.com
seconddomain=mydomainhere.net
mailserverdomain=mail
timezonename=America/Montreal
firstemail=myemailuser@$mydomain
firstemailpassword=MyPassword12345
firstemailalias=myaliasusername@$seconddomain
firstemailaliasdestination=myemailuser@$mydomain
secondemail=admin@$mydomain
secondemailpassword=MyOtherPassword
mailserverfolder=/opt/docker-mailserver
certbotdomains=$mydomain
#certbotdomains=$mydomain,$seconddomain
letsencryptemail=letsencrypt@$mydomain
postmasteremail=postmaster@$mydomain

mkdir $mailserverfolder ; cd $mailserverfolder
DMS_GITHUB_URL='https://raw.githubusercontent.com/docker-mailserver/docker-mailserver/master'
wget "${DMS_GITHUB_URL}/docker-compose.yml"
wget "${DMS_GITHUB_URL}/mailserver.env"
wget "${DMS_GITHUB_URL}/setup.sh"
chmod a+x $mailserverfolder/setup.sh

sed -i "s/    hostname: mail/    hostname: $mailserverdomain/" ${mailserverfolder}/docker-compose.yml
sed -i "s/    domainname: example.com/    domainname: $mydomain/" ${mailserverfolder}/docker-compose.yml
sed -i "s#      - ./docker-data/dms/config/:/tmp/docker-mailserver/#      - ./docker-data/dms/config/:/tmp/docker-mailserver/\n      - /etc/letsencrypt/:/etc/letsencrypt/#g" ${mailserverfolder}/docker-compose.yml
echo POSTMASTER_ADDRESS=$postmasteremail >> ${mailserverfolder}/mailserver.env
echo TZ=$timezonename >> ${mailserverfolder}/mailserver.env
echo SSL_TYPE=letsencrypt >> ${mailserverfolder}/mailserver.env

certbot certonly --standalone -d $certbotdomains -m $letsencryptemail --agree-tos -n
docker-compose up -d mailserver
${mailserverfolder}/setup.sh email add $firstemail $firstemailpassword
if [[ -v $firstemailalias ]]; then ${mailserverfolder}/setup.sh alias add $firstemailalias $firstemailaliasdestination; fi
if [[ -v secondemail ]]; then ${mailserverfolder}/setup.sh email add $secondemail $secondemailpassword; fi
${mailserverfolder}/setup.sh config dkim
echo paste the text between the first and very last \" to your mail._domainkey.$mydomain DNS TXT record
cat `find $mailserverfolder | grep mail.txt`