Panduan Instalasi Forward Email Self-Hosting untuk Debian

Panduan ini menyediakan petunjuk langkah demi langkah untuk menginstal solusi Forward Email yang dihosting sendiri pada sistem Debian. Panduan ini secara khusus dirancang untuk Debian 11 (Bullseye) dan Debian 12 (Bookworm).

Sebelum memulai instalasi, pastikan Anda memiliki:

  • Server Debian: Versi 11 (Bullseye) atau 12 (Bookworm)
  • Akses Root: Anda harus dapat menjalankan perintah sebagai root (akses sudo)
  • Nama domain: Domain yang Anda kendalikan dengan akses manajemen DNS
  • Server Bersih:Disarankan untuk menggunakan instalasi Debian baru
  • Koneksi Internet: Diperlukan untuk mengunduh paket dan gambar Docker

  • RAMMinimal 2GB (disarankan 4GB untuk produksi)
  • Penyimpanan: Minimal ruang yang tersedia 20 GB (disarankan 50 GB+ untuk produksi)
  • CPU: Minimal 1 vCPU (disarankan 2+ vCPU untuk produksi)
  • Jaringan: Alamat IP publik dengan port yang dapat diakses berikut:
    • 22 (SSH)
    • 25 (SMTP)
    • 80 (HTTP)
    • 443 (HTTPS)
    • 465 (SMTPS)
    • 993 (IMAPS)
    • 995 (POP3S)

Langkah 1: Pengaturan Sistem Awal

Pertama, pastikan sistem Anda sudah diperbarui dan beralihlah ke pengguna root:

# Update system packages
sudo apt update && sudo apt upgrade -y

Switch to root user (required for the installation)

sudo su -

Langkah 2: Konfigurasikan DNS Resolver

Konfigurasikan sistem Anda untuk menggunakan server DNS Cloudflare untuk pembuatan sertifikat yang andal:

# Stop and disable systemd-resolved if running
if systemctl is-active --quiet systemd-resolved; then
    rm /etc/resolv.conf
    systemctl stop systemd-resolved
    systemctl disable systemd-resolved
    systemctl mask systemd-resolved
fi

Configure Cloudflare DNS resolvers

tee /etc/resolv.conf > /dev/null <<EOF nameserver 1.1.1.1 nameserver 2606:4700:4700::1111 nameserver 1.0.0.1 nameserver 2606:4700:4700::1001 nameserver 8.8.8.8 nameserver 2001:4860:4860::8888 nameserver 8.8.4.4 nameserver 2001:4860:4860::8844 EOF

Langkah 3: Instal Ketergantungan Sistem

Instal paket yang diperlukan untuk Forward Email di Debian:

# Update package list
apt-get update -y

Install basic dependencies (Debian-specific package list)

apt-get install -y
ca-certificates
curl
gnupg
git
openssl
lsb-release
apt-transport-https
software-properties-common

Langkah 4: Instal dan Konfigurasi Snapd

Debian tidak menyertakan snapd secara default, jadi kita perlu menginstal dan mengonfigurasinya:

# Install snapd
apt-get install -y snapd

Enable and start snapd service

systemctl enable snapd systemctl start snapd

Create symlink for snap to work properly

ln -sf /var/lib/snapd/snap /snap

Wait for snapd to be ready

sleep 10

Verify snapd is working

snap version

Langkah 5: Instal Paket Snap

Instal AWS CLI dan Certbot melalui snap:

# Install AWS CLI
snap install aws-cli --classic

Install Certbot and DNS plugin

snap install certbot --classic snap set certbot trust-plugin-with-root=ok snap install certbot-dns-cloudflare

Verify installations

aws --version certbot --version

Langkah 6: Instal Docker

Instal Docker CE dan Docker Compose di Debian:

# Add Docker's official GPG key (Debian-specific)
install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg | tee /etc/apt/keyrings/docker.asc
chmod a+r /etc/apt/keyrings/docker.asc

Add Docker repository (Debian-specific)

echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list

Update package index and install Docker

apt-get update -y apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Install standalone docker-compose as fallback (if plugin doesn't work)

if ! command -v docker-compose &> /dev/null; then apt-get install -y docker-compose fi

Verify Docker installation

docker --version docker compose version || docker-compose --version

Langkah 7: Konfigurasikan Layanan Docker

Pastikan Docker dimulai secara otomatis dan berjalan:

# Enable and start Docker service
systemctl unmask docker
systemctl enable docker
systemctl start docker

Verify Docker is running

docker info

Jika Docker gagal untuk memulai, coba memulainya secara manual:

# Alternative startup method if systemctl fails
nohup dockerd >/dev/null 2>/dev/null &
sleep 5
docker info

Langkah 8: Instal dan Konfigurasikan Firewall UFW

Instalasi minimal Debian mungkin tidak menyertakan UFW, jadi instal terlebih dahulu:

# Install UFW if not present
if ! command -v ufw &> /dev/null; then
    apt-get update -y
    apt-get install -y ufw
fi

Set default policies

ufw default deny incoming ufw default allow outgoing

Allow SSH (important - don't lock yourself out!)

ufw allow 22/tcp

Allow email-related ports

ufw allow 25/tcp # SMTP ufw allow 80/tcp # HTTP (for Let's Encrypt) ufw allow 443/tcp # HTTPS ufw allow 465/tcp # SMTPS ufw allow 993/tcp # IMAPS ufw allow 995/tcp # POP3S ufw allow 2993/tcp # IMAP (alternative port) ufw allow 2995/tcp # POP3 (alternative port) ufw allow 3456/tcp # Custom service port ufw allow 4000/tcp # Custom service port ufw allow 5000/tcp # Custom service port

Allow local database connections

ufw allow from 127.0.0.1 to any port 27017 # MongoDB ufw allow from 127.0.0.1 to any port 6379 # Redis

Enable firewall

echo "y" | ufw enable

Check firewall status

ufw status numbered

Langkah 9: Kloning Repositori Email Teruskan

Unduh kode sumber Email Terusan:

# Set up variables
REPO_FOLDER_NAME="forwardemail.net"
REPO_URL="https://github.com/forwardemail/forwardemail.net.git"
ROOT_DIR="/root/$REPO_FOLDER_NAME"

Clone the repository

git clone "$REPO_URL" "$ROOT_DIR" cd "$ROOT_DIR"

Verify the clone was successful

ls -la

Langkah 10: Siapkan Konfigurasi Lingkungan

Siapkan konfigurasi lingkungan:

# Set up directory variables
SELF_HOST_DIR="$ROOT_DIR/self-hosting"
ENV_FILE_DEFAULTS=".env.defaults"
ENV_FILE=".env"

Copy default environment file

cp "$ROOT_DIR/$ENV_FILE_DEFAULTS" "$SELF_HOST_DIR/$ENV_FILE"

Create SSL directory

mkdir -p "$SELF_HOST_DIR/ssl"

Create database directories

mkdir -p "$SELF_HOST_DIR/sqlite-data" mkdir -p "$SELF_HOST_DIR/mongo-backups" mkdir -p "$SELF_HOST_DIR/redis-backups"

Langkah 11: Konfigurasikan Domain Anda

Tetapkan nama domain Anda dan perbarui variabel lingkungan:

# Replace 'yourdomain.com' with your actual domain
DOMAIN="yourdomain.com"

Function to update environment file

update_env_file() { local key="$1" local value="$2"

if grep -qE "^${key}=" "$SELF_HOST_DIR/$ENV_FILE"; then sed -i -E "s|^${key}=.*|${key}=${value}|" "$SELF_HOST_DIR/$ENV_FILE" else echo "${key}=${value}" >> "$SELF_HOST_DIR/$ENV_FILE" fi }

Update domain-related environment variables

update_env_file "DOMAIN" "$DOMAIN" update_env_file "NODE_ENV" "production" update_env_file "HTTP_PROTOCOL" "https" update_env_file "WEB_HOST" "$DOMAIN" update_env_file "WEB_PORT" "443" update_env_file "CALDAV_HOST" "caldav.$DOMAIN" update_env_file "CARDDAV_HOST" "carddav.$DOMAIN" update_env_file "API_HOST" "api.$DOMAIN" update_env_file "APP_NAME" "$DOMAIN" update_env_file "SMTP_HOST" "smtp.$DOMAIN" update_env_file "SMTP_PORT" "465" update_env_file "IMAP_HOST" "imap.$DOMAIN" update_env_file "IMAP_PORT" "993" update_env_file "POP3_HOST" "pop3.$DOMAIN" update_env_file "POP3_PORT" "995" update_env_file "MX_HOST" "mx.$DOMAIN" update_env_file "SMTP_EXCHANGE_DOMAINS" "mx.$DOMAIN" update_env_file "SELF_HOSTED" "true" update_env_file "WEBSITE_URL" "$DOMAIN" update_env_file "AUTH_BASIC_ENABLED" "true"

Langkah 12: Hasilkan Sertifikat SSL

# Generate certificates using manual DNS challenge
certbot certonly \
  --manual \
  --agree-tos \
  --preferred-challenges dns \
  -d "*.$DOMAIN" \
  -d "$DOMAIN"

Penting: Saat diminta, Anda harus membuat catatan TXT di DNS Anda. Anda mungkin melihat beberapa tantangan untuk domain yang sama - buat SEMUANYAJangan hapus rekaman TXT pertama saat menambahkan rekaman TXT kedua.

Opsi B: DNS Cloudflare (Jika Anda menggunakan Cloudflare)

Jika domain Anda menggunakan Cloudflare untuk DNS, Anda dapat mengotomatiskan pembuatan sertifikat:

# Create Cloudflare credentials file
cat > /root/.cloudflare.ini <<EOF
dns_cloudflare_email = "your-email@example.com"
dns_cloudflare_api_key = "your-cloudflare-global-api-key"
EOF

Set proper permissions

chmod 600 /root/.cloudflare.ini

Generate certificates automatically

certbot certonly
--dns-cloudflare
--dns-cloudflare-credentials /root/.cloudflare.ini
-d "$DOMAIN"
-d "*.$DOMAIN"
--non-interactive
--agree-tos
--email "your-email@example.com"

Salinan Sertifikat

Setelah pembuatan sertifikat, salin ke direktori aplikasi:

# Copy certificates to application SSL directory
cp /etc/letsencrypt/live/$DOMAIN*/* "$SELF_HOST_DIR/ssl/"

Verify certificates were copied

ls -la "$SELF_HOST_DIR/ssl/"

Langkah 13: Hasilkan Kunci Enkripsi

Buat berbagai kunci enkripsi yang diperlukan untuk operasi yang aman:

# Generate helper encryption key
helper_encryption_key=$(openssl rand -base64 32 | tr -d /=+ | cut -c -32)
update_env_file "HELPER_ENCRYPTION_KEY" "$helper_encryption_key"

Generate SRS secret for email forwarding

srs_secret=$(openssl rand -base64 32 | tr -d /=+ | cut -c -32) update_env_file "SRS_SECRET" "$srs_secret"

Generate TXT encryption key

txt_encryption_key=$(openssl rand -hex 16) update_env_file "TXT_ENCRYPTION_KEY" "$txt_encryption_key"

Generate DKIM private key for email signing

openssl genrsa -f4 -out "$SELF_HOST_DIR/ssl/dkim.key" 2048 update_env_file "DKIM_PRIVATE_KEY_PATH" "/app/ssl/dkim.key"

Generate webhook signature key

webhook_signature_key=$(openssl rand -hex 16) update_env_file "WEBHOOK_SIGNATURE_KEY" "$webhook_signature_key"

Set SMTP transport password

update_env_file "SMTP_TRANSPORT_PASS" "$(openssl rand -base64 32)"

echo "✅ All encryption keys generated successfully"

Langkah 14: Perbarui Jalur SSL dalam Konfigurasi

Konfigurasikan jalur sertifikat SSL di file lingkungan:

# Update SSL paths to point to the correct certificate files
sed -i -E \
  -e 's|^(.*_)?SSL_KEY_PATH=.*|\1SSL_KEY_PATH=/app/ssl/privkey.pem|' \
  -e 's|^(.*_)?SSL_CERT_PATH=.*|\1SSL_CERT_PATH=/app/ssl/fullchain.pem|' \
  -e 's|^(.*_)?SSL_CA_PATH=.*|\1SSL_CA_PATH=/app/ssl/chain.pem|' \
  "$SELF_HOST_DIR/$ENV_FILE"

Langkah 15: Siapkan Autentikasi Dasar

Buat kredensial autentikasi dasar sementara:

# Generate a secure random password
PASSWORD=$(openssl rand -base64 16)

Update environment file with basic auth credentials

update_env_file "AUTH_BASIC_USERNAME" "admin" update_env_file "AUTH_BASIC_PASSWORD" "$PASSWORD"

Display credentials (save these!)

echo "" echo "🔐 IMPORTANT: Save these login credentials!" echo "==================================" echo "Username: admin" echo "Password: $PASSWORD" echo "==================================" echo "" echo "You'll need these to access the web interface after installation." echo ""

Langkah 16: Terapkan dengan Docker Compose

Mulai semua layanan Email Teruskan:

# Set Docker Compose file path
DOCKER_COMPOSE_FILE="$SELF_HOST_DIR/docker-compose-self-hosted.yml"

Stop any existing containers

if command -v docker-compose &> /dev/null; then docker-compose -f "$DOCKER_COMPOSE_FILE" down else docker compose -f "$DOCKER_COMPOSE_FILE" down fi

Pull the latest images

if command -v docker-compose &> /dev/null; then docker-compose -f "$DOCKER_COMPOSE_FILE" pull else docker compose -f "$DOCKER_COMPOSE_FILE" pull fi

Start all services in detached mode

if command -v docker-compose &> /dev/null; then docker-compose -f "$DOCKER_COMPOSE_FILE" up -d else docker compose -f "$DOCKER_COMPOSE_FILE" up -d fi

Wait a moment for services to start

sleep 10

Check service status

if command -v docker-compose &> /dev/null; then docker-compose -f "$DOCKER_COMPOSE_FILE" ps else docker compose -f "$DOCKER_COMPOSE_FILE" ps fi

Langkah 17: Verifikasi Instalasi

Periksa apakah semua layanan berjalan dengan benar:

# Check Docker containers
docker ps

Check service logs for any errors

if command -v docker-compose &> /dev/null; then docker-compose -f "$DOCKER_COMPOSE_FILE" logs --tail=50 else docker compose -f "$DOCKER_COMPOSE_FILE" logs --tail=50 fi

Test web interface connectivity

curl -I https://$DOMAIN

Check if ports are listening

ss -tlnp | grep -E ':(25|80|443|465|587|993|995)'

Pengaturan Rekaman DNS

Anda perlu mengonfigurasi catatan DNS berikut untuk domain Anda:

Catatan MX

@ MX 10 mx.yourdomain.com

Catatan A

@ A YOUR_SERVER_IP
mx A YOUR_SERVER_IP
smtp A YOUR_SERVER_IP
imap A YOUR_SERVER_IP
pop3 A YOUR_SERVER_IP
api A YOUR_SERVER_IP
caldav A YOUR_SERVER_IP
carddav A YOUR_SERVER_IP

Catatan SPF

@ TXT "v=spf1 mx ~all"

DKIM Record

Dapatkan kunci publik DKIM Anda:

# Extract DKIM public key
openssl rsa -in "$SELF_HOST_DIR/ssl/dkim.key" -pubout -outform DER | openssl base64 -A

Buat rekaman DNS DKIM:

default._domainkey TXT "v=DKIM1; k=rsa; p=YOUR_DKIM_PUBLIC_KEY"

Catatan DMARC

_dmarc TXT "v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com"

Login Pertama

  1. Buka browser web Anda dan navigasikan ke https://yourdomain.com
  2. Masukkan kredensial otentikasi dasar yang Anda simpan sebelumnya
  3. Selesaikan panduan pengaturan awal
  4. Buat akun email pertama Anda

Siapkan Cadangan yang Kompatibel dengan S3

Konfigurasikan pencadangan otomatis ke penyimpanan yang kompatibel dengan S3:

# Create AWS credentials directory
mkdir -p ~/.aws

Configure AWS credentials

cat > ~/.aws/credentials <<EOF [default] aws_access_key_id = YOUR_ACCESS_KEY_ID aws_secret_access_key = YOUR_SECRET_ACCESS_KEY EOF

Configure AWS settings

cat > ~/.aws/config <<EOF [default] region = auto output = json EOF

For non-AWS S3 (like Cloudflare R2), add endpoint URL

echo "endpoint_url = YOUR_S3_ENDPOINT_URL" >> ~/.aws/config

Menyiapkan Pekerjaan Cron Cadangan

# Make backup scripts executable
chmod +x "$ROOT_DIR/self-hosting/scripts/backup-mongo.sh"
chmod +x "$ROOT_DIR/self-hosting/scripts/backup-redis.sh"

Add MongoDB backup cron job (runs daily at midnight)

(crontab -l 2>/dev/null; echo "0 0 * * * $ROOT_DIR/self-hosting/scripts/backup-mongo.sh >> /var/log/mongo-backup.log 2>&1") | crontab -

Add Redis backup cron job (runs daily at midnight)

(crontab -l 2>/dev/null; echo "0 0 * * * $ROOT_DIR/self-hosting/scripts/backup-redis.sh >> /var/log/redis-backup.log 2>&1") | crontab -

Verify cron jobs were added

crontab -l

Siapkan pembaruan otomatis untuk instalasi Email Terusan Anda:

# Create auto-update command (use appropriate docker compose command)
if command -v docker-compose &> /dev/null; then
    DOCKER_UPDATE_CMD="docker-compose -f $DOCKER_COMPOSE_FILE pull && docker-compose -f $DOCKER_COMPOSE_FILE up -d"
else
    DOCKER_UPDATE_CMD="docker compose -f $DOCKER_COMPOSE_FILE pull && docker compose -f $DOCKER_COMPOSE_FILE up -d"
fi

Add auto-update cron job (runs daily at 1 AM)

(crontab -l 2>/dev/null; echo "0 1 * * * $DOCKER_UPDATE_CMD >> /var/log/autoupdate.log 2>&1") | crontab -

Verify the cron job was added

crontab -l

Perbedaan Manajemen Paket

  • Snapd: Tidak terinstal secara default di Debian, memerlukan instalasi manual
  • Buruh pelabuhan: Menggunakan repositori khusus Debian dan kunci GPG
  • UFW: Mungkin tidak disertakan dalam instalasi Debian minimal
  • sistemd: Perilaku mungkin sedikit berbeda dari Ubuntu

Manajemen Layanan

# Check service status (Debian-specific commands)
systemctl status snapd
systemctl status docker
systemctl status ufw

Restart services if needed

systemctl restart snapd systemctl restart docker

Konfigurasi Jaringan

Debian mungkin memiliki nama antarmuka jaringan atau konfigurasi yang berbeda:

# Check network interfaces
ip addr show

Check routing

ip route show

Check DNS resolution

nslookup google.com

Lokasi Log

  • Log Docker Compose: Gunakan perintah docker compose yang sesuai berdasarkan instalasi
  • Log sistem: /var/log/syslog
  • Log cadangan: /var/log/mongo-backup.log, /var/log/redis-backup.log
  • Log pembaruan otomatis: /var/log/autoupdate.log
  • Catatan Snapd: journalctl -u snapd

Tugas Perawatan Rutin

  1. Memantau ruang disk: df -h
  2. Periksa status layanan: Gunakan perintah docker compose yang sesuai
  3. Tinjauan log: Periksa log aplikasi dan sistem
  4. Perbarui paket sistem: apt update && apt upgrade
  5. Pantau snapd: snap list dan snap refresh

Perpanjangan Sertifikat

Sertifikat harus diperbarui secara otomatis, tetapi Anda dapat memperbaruinya secara manual jika diperlukan:

# Manual certificate renewal
certbot renew

Copy renewed certificates

cp /etc/letsencrypt/live/$DOMAIN*/* "$SELF_HOST_DIR/ssl/"

Restart services to use new certificates

if command -v docker-compose &> /dev/null; then docker-compose -f "$DOCKER_COMPOSE_FILE" restart else docker compose -f "$DOCKER_COMPOSE_FILE" restart fi

Masalah Khusus Debian

1. Snapd Tidak Berfungsi

# Check snapd status
systemctl status snapd

Restart snapd

systemctl restart snapd

Check snap path

echo $PATH | grep snap

Add snap to PATH if missing

echo 'export PATH=$PATH:/snap/bin' >> ~/.bashrc source ~/.bashrc

2. Perintah Docker Compose Tidak Ditemukan

# Check which docker compose command is available
command -v docker-compose
command -v docker

Use the appropriate command in scripts

if command -v docker-compose &> /dev/null; then echo "Using docker-compose" else echo "Using docker compose" fi

3. Masalah Instalasi Paket

# Update package cache
apt update

Fix broken packages

apt --fix-broken install

Check for held packages

apt-mark showhold

Masalah Umum

1. Layanan Docker Tidak Dapat Dimulai

# Check Docker status
systemctl status docker

Check Docker logs

journalctl -u docker

Try alternative startup

nohup dockerd >/dev/null 2>/dev/null &

2. Pembuatan Sertifikat Gagal

  • Pastikan port 80 dan 443 dapat diakses
  • Verifikasi catatan DNS mengarah ke server Anda
  • Periksa pengaturan firewall dengan ufw status

3. Masalah Pengiriman Email

  • Verifikasi bahwa catatan MX sudah benar
  • Periksa catatan SPF, DKIM, dan DMARC
  • Pastikan port 25 tidak diblokir oleh penyedia hosting Anda

Mendapatkan Bantuan

  1. Jaga Sistem Tetap Terkini: Perbarui Debian dan paket secara teratur
  2. Memantau Log: Siapkan pemantauan dan peringatan log
  3. Cadangkan Secara Teratur: Menguji prosedur pencadangan dan pemulihan
  4. Gunakan Kata Sandi yang Kuat: Hasilkan kata sandi yang kuat untuk semua akun
  5. Aktifkan Fail2Ban: Pertimbangkan untuk menginstal fail2ban untuk keamanan tambahan
  6. Audit Keamanan Reguler: Tinjau konfigurasi Anda secara berkala
  7. Pantau Snapd: Tetap perbarui paket snap dengan snap refresh

Instalasi Forward Email yang Anda hosting sendiri sekarang sudah lengkap dan berjalan di Debian. Ingatlah untuk:

  1. Konfigurasikan catatan DNS Anda dengan benar
  2. Uji coba pengiriman dan penerimaan email
  3. Siapkan pencadangan rutin
  4. Pantau sistem Anda secara teratur
  5. Jaga agar instalasi Anda tetap diperbarui
  6. Pantau paket snapd dan snap

Perbedaan utama dari Ubuntu adalah instalasi snapd dan konfigurasi repositori Docker. Setelah keduanya diatur dengan benar, aplikasi Forward Email akan berfungsi sama pada kedua sistem.

Untuk opsi konfigurasi tambahan dan fitur lanjutan, lihat dokumentasi Forward Email resmi di https://forwardemail.net/self-hosted#configuration.