Mailserver Installation

mailserver.md

Fail2Ban

sudo install fail2ban

UFW

sudo install ufw

UFW Settings

sudu ufw default deny incomoing

sudo ufw default allow outgoins

sudo ufw allow 22,25,80,110,143,443,465,587,993,995,4190/tcp

sudo ufw enable

Mailserver

Install curl and git

sudo apt install curl git -y

Install Docker

su

curl -sSL https://get.docker.com/ | CHANNEL=stable sh

systemctl enable --now docker

Install Docker Compose

curl -sSL https://github.com/docker/compose/releases/download/v$(curl -Ls https://www.servercow.de/docker-compose/latest)/docker-compose-$(uname -s)-$(uname -m) > /usr/local/bin/docker-compose

chmod +x /usr/local/bin/docker-compose

Install the mail server

su

cd /opt

git clone https://github.com/mailcow/mailcow-dockerized

cd mailcow-dockerized

./generate_config.sh

Start the mail server

docker-compose pull

docker-compose up -d

if you are struggling with slow dashboard and high system resource useage, you need to install docker via the original documantation and then enter docker compose up -d because in latest versions it changed from docker-compose to docker compose. İts adding docker to apt-get packet manager and its make way more easier to update to new versions.
The main problem when ı tried this ı had an error called Solved: APT GPG Error NO_PUBKEY, thats because of /etc/opt/keyrings/docker.gpg file is didnt downloaded or it have wrong key, ı solved it with downloading key manualy with this commands:

sudo apt-get install gnupg
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg

after this, you will have latest version of docker with connected apt-get. It will make mailcow system way more faster atleast its been like that

Hi! I am able to receive mails but can't send can anyone help me on that?

@abirhossain-git what error you are getting on sending email?