安裝設定 MailU (Docker Compose) Mail Server

這是本文件的舊版！

安裝環境 : OS:Ubuntu 20.04 +Docker vCore:1 RAM:2G HD:55G
設定資訊 : Exp.
- DNS :
  - mail01.ichiayi.com. IN A 140.82.11.111
  - mail01.ichiayi.com. IN MX 10 mail01.ichiayi.com.
- Reverse DNS :
  - 140.82.11.111 → mail01.ichiayi.com
- DKIM/SPF & DMARC Entries
  - 等安裝好 MailU 再透過 admin 生成相關資訊到 DNS 進行設定
- 郵件資料路徑
  - 預設 /mailu
- 主機防火牆要開放連入 Port
  - 25, 80, 110, 143, 443, 465, 587, 993 或 995

如果要使用 Let's Encrypt 免費憑證必須要

DNS 內 A Record 需要有 hostname 並指向 Mail Server 的 IP Exp. mail01.ichiayi.com → 140.82.11.111
hostname 就是 Mail Server 名稱 Exp. mail01.ichiayi.com

安裝 Ubuntu 20.04 +Docker

開啟主機防火牆

ufw allow proto tcp from any to any port 25,80,110,143,443,465,587,993,995 comment 'Open SSH/Web/Mail ports'
ufw allow proto udp from any to any port 161 comment 'Open SNMP ports'

使用 https://setup.mailu.io/2.0/ 產生設定檔
1. Version : 2.0
2. Step1:
  1. Mailu storage path: /mailu
  2. Main mail domain and server display name. : mail01.ichiayi.com
  3. Postmaster local part : admin
  4. TLS certificates : letsencrypt
  5. Authentication rate limit per IP for failed login : 5 /hour
  6. Authentication rate limit per user : 50 /day
  7. Outgoing message rate limit (per user) : 5000 /day
  8. Website name : mail01 for ichiayi.com
  9. Linked Website URL : https://www.ichiayi.com
  10. Enable the admin UI : /admin
3. Step 2 - Pick some features
  1. Enable Web email client : none
4. Step 3 - expose Mailu to the world
  1. IPv4 listen address : 0.0.0.0
  2. Subnet of the docker network : 192.168.203.0/24
  3. Public hostnames : ichiayi-mailu.ichiayi.com
依照 https://setup.mailu.io/2.0/ 建議執行
1. Step 1 - Download your configuration files
```
mkdir /mailu
cd /mailu
wget https://setup.mailu.io/2.0/file/0827c1b0-1fad-479d-xxxx-23a71d37744f/docker-compose.yml
wget https://setup.mailu.io/2.0/file/0827c1b0-1fad-479d-xxxx-23a71d37744f/mailu.env
```
2. Step 2 - Review the configuration : 確認 docker-compose.yml 與 mailu.env 內容是否正常
3. Step 3 - Start the Compose project
```
cd /mailu
docker compose -p mailu up -d
```
- 等啟動 MailU 服務後, 設定管理者密碼 Exp. My_12345Password
```
docker compose -p mailu exec admin flask mailu admin admin mail01.ichiayi.com My_12345Password
```
- 連上 Web 管理介面 https://mail01.ichiayi.com/admin
  - Administration → Mail domains → Actions → Details 可以看到 DNS SPF entries / DNS TLSA entry / DNS client auto-configuration entries 的設定資訊

https://github.com/Mailu/Mailu

mailserver

安裝設定 MailU (Docker Compose) Mail Server

安裝程序

參考網址