poste.io邮局搭建

apt install -y nginx
mkdir /etc/nginx/conf.d/ssl

vim /etc/nginx/nginx.conf

user root;
worker_processes auto;
pid /run/nginx.pid;
error_log /var/log/nginx/error.log;
include /etc/nginx/modules-enabled/*.conf;

events {
	worker_connections 768;
	# multi_accept on;
}

http {
	sendfile on;
	tcp_nopush on;
	types_hash_max_size 2048;

	include /etc/nginx/mime.types;
	default_type application/octet-stream;

	ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3; # Dropping SSLv3, ref: POODLE
	ssl_prefer_server_ciphers on;

	access_log /var/log/nginx/access.log;


	gzip on;

	# gzip_vary on;
	# gzip_proxied any;
	# gzip_comp_level 6;
	# gzip_buffers 16 8k;
	# gzip_http_version 1.1;
	# gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

	##
	# Virtual Host Configs
	##

	include /etc/nginx/conf.d/*.conf;
	include /etc/nginx/sites-enabled/*;
	
	
	upstream poste_backend { server 127.0.0.1:8808; }
	
	server {
		listen 80;
		server_name mail.example.com imap.example.com smtp.example.com pop.example.com;
	
		location ^~ /.well-known/acme-challenge/ {
			proxy_pass         http://poste_backend;
			proxy_set_header   Host $host;
		}
		return 301 https://$host$request_uri;
	}
	
	server {
		listen 443 ssl http2;
		server_name mail.example.com imap.example.com smtp.example.com pop.example.com;
	
		ssl_certificate     /etc/nginx/conf.d/ssl/mail.example.com.crt;
		ssl_certificate_key /etc/nginx/conf.d/ssl/mail.example.com.key;
		ssl_protocols       TLSv1.2 TLSv1.3;
		ssl_prefer_server_ciphers on;
	
		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains";
	
		location ^~ /.well-known/acme-challenge/ {
			proxy_pass       http://poste_backend;
			proxy_set_header Host $host;
		}
	
		location / {
			proxy_pass                   http://poste_backend;
			proxy_set_header Host        $host;
			proxy_set_header X-Real-IP   $remote_addr;
			proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
			proxy_set_header X-Forwarded-Proto $scheme;
			proxy_set_header Upgrade     $http_upgrade;
			proxy_set_header Connection  'upgrade';
			proxy_read_timeout 86400;
		}
	}

	
}

curl https://get.acme.sh | sh -s email=example@gmail.com
~/.acme.sh/acme.sh --upgrade --auto-upgrade
~/.acme.sh/acme.sh --issue -d mail.example.com --standalone
# 安装证书
~/.acme.sh/acme.sh --install-cert -d mail.example.com --key-file /etc/nginx/conf.d/ssl/mail.example.com.key
~/.acme.sh/acme.sh --install-cert -d mail.example.com --fullchain-file /etc/nginx/conf.d/ssl/mail.example.com.crt

[xxxxxxxxxx] LEScript.INFO: Got certificate! YAY!
[xxxxxxxxxx] LEScript.INFO: Saving fullchain.pem
[xxxxxxxxxx] LEScript.INFO: Saving cert.pem
[xxxxxxxxxx] LEScript.INFO: Saving chain.pem
[xxxxxxxxxx] LEScript.INFO: Done !!§§!