容器(Docker)自建邮箱poste.io

2021-07-04

2分钟阅读时长

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使用poste.io(Docker)自建邮局

在若大的互联网，我们都会通过邮箱注册各种各样的账号，但是很多时候只有一个主邮箱有着诸多不便，所以我们希望，最好是一个平台对应一个email，且无限制。

我在找了很多可以私有部署的邮局之后，最终选择了poste.io，只看中了一个点，轻量化部署，1G内存完全足矣，而且部署方便，也就意味着迁移方便。

环境

下面我将在腾讯云的VPS上面部署，配置如下：

1 Core 1G RAM Ubuntu +宝塔

uname -a
Linux VM-*-*-ubuntu 5.4.110-bbrplus #1 SMP Sat Apr 10 01:14:42 CST 2021 x86_64 x86_64 x86_64 GNU/Linux

docker和docker-componse安装请参考Install Docker Engine on CentOS和Install Docker Compose。

运行poste.io

$ mkdir -p /www/wwwroot/tools/mail
$  cd /www/wwwroot/tools/mail

$ mkdir data

创建docker-compose.yml配置文件

$ nano docker-compose.yml
version: "3.3"

services:
  mail:
    image: analogic/poste.io
    restart: always
    hostname: mail.kquark.com
    ports:
     - "25:25"
     - "172.17.0.1:62030:8080"
     #- "4433:4433"
     - "110:110"
     - "143:143"
     - "465:465"
     - "587:587"
     - "993:993"
     - "995:995"
    environment:
     - TZ=Asia/Shanghai
     - DISABLE_CLAMAV=TRUE
     - DISABLE_RSPAMD=TRUE
     - HTTPS=OFF
     - HTTP_PORT=8080
     #- HTTPS_PORT=4433
    volumes:
     - ./data:/data

由于https是在NGINX上面配置的，所以poste.io只运行80端口且绑定在172.17.0.1:8080这个docker的host地址。

下面两个配置是关闭反垃圾邮件的功能，实测可以节省很多内存

- DISABLE_CLAMAV=TRUE
- DISABLE_RSPAMD=TRUE

在部署中，HTTPS我们在NGINX中上面配置，为了可以共用80和443，至于那些选项是什么意思，可以参考Getting started，官方文档会有说明。

运行

$ docker-compose up -d

出错

Status: Downloaded newer image for analogic/poste.io:latest
Creating mail_mail_1 ...
Creating mail_mail_1 ... error

ERROR: for mail_mail_1  Cannot start service mail: driver failed programming external connectivity on endpoint mail_mail_1 (999b3565861677c81593522d582fc590e50576437d6551e70db650a4ed73fc86): Error starting userland proxy: listen tcp4 0.0.0.0:587: bind: address already in use

ERROR: for mail  Cannot start service mail: driver failed programming external connectivity on endpoint mail_mail_1 (999b3565861677c81593522d582fc590e50576437d6551e70db650a4ed73fc86): Error starting userland proxy: listen tcp4 0.0.0.0:587: bind: address already in use
ERROR: Encountered errors while bringing up the project.

[email protected]*-*-ubuntu:/www/wwwroot/tools/mail# lsof -i:587
COMMAND     PID USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
master  3167292 root   18u  IPv4 49042101      0t0  TCP *:submission (LISTEN)
master  3167292 root   19u  IPv6 49042102      0t0  TCP *:submission (LISTEN)
[email protected]*-*-ubuntu:/www/wwwroot/tools/mail# kill -9 3167292
[email protected]*-*-ubuntu:/www/wwwroot/tools/mail# lsof -i:587

查看日志

$ docker-compose logs -f
# 当出现下面的提示表示启动完成
......

mail_1  | &#91;cont-init.d] 98-timezone.sh: exited 0.
mail_1  | &#91;cont-init.d] 99-custom-plugins: executing...
mail_1  | &#91;cont-init.d] 99-custom-plugins: exited 0.
mail_1  | &#91;cont-init.d] done.
mail_1  | &#91;services.d] starting services
mail_1  |
mail_1  |
mail_1  |  Poste.io administration available at https://172.19.0.2:443 or http://172.19.0.2:8080
mail_1  |
mail_1  |
mail_1  | &#91;services.d] done.

配置DNS解析

官方文档请参考Configuring DNS，我的域名是放在Cloudflare的，首先我们需要加一条A记录，如下：

增加imap、pop、smtp记录

增加MX、SPF、DMARC

容器(Docker)自建邮箱poste.io

环境

运行poste.io

配置DNS解析

配置宝塔

配置

结尾

端口	描述
25	SMTP – mostly processing incoming mails
110	POP3 – standard protocol for accessing mailbox, STARTTLS is required before client auth
143	IMAP – standard protocol for accessing mailbox, STARTTLS is required before client auth
465	SMTPS – Legacy SMTPs port
587	MSA – SMTP port used primarily for email clients after STARTTLS and auth
993	IMAPS – alternative port for IMAP encrypted since connection
995	POP3S – encrypted POP3 since connections