电子邮件(E-mail)

SMTP服务器: smtp.qq.com 端口: 465（SSL加密）

IMAP服务器: imap.qq.com 端口: 993（SSL加密）

POP3服务器: pop.qq.com 端口: 995（SSL加密）

SMTP

POP

IMAP

Webmail

下载Roundcube https://roundcube.net/download/

浏览器访问http://localhost/webmail/installer.php

sudo apt-get update
sudo apt-get install postfix
sudo dpkg-reconfigure postfix
General type of mail configuration: Internet Site
NONE doesn't appear to be requested in current config
System mail name: example.com
Root and postmaster mail recipient: <admin_user_name>
Other destinations for mail: server1.example.com, example.com, localhost.example.com, localhost
Force synchronous updates on mail queue?: No
Local networks: 127.0.0.0/8
Yes doesn't appear to be requested in current config
Mailbox size limit (bytes): 0
Local address extension character: +
Internet protocols to use: all

#方法二
sudo vi /etc/postfix/main.cf
myhostname = example.com
alias_maps = hash:/etc/postfix/virtual

sudo apt install dovecot-core dovecot-imapd dovecot-pop3d 

sudo vi /etc/dovecot/dovecot.conf
protocols = imap pop3
sudo vi /etc/dovecot/conf.d/10-mail.conf
mail_location = maildir:~/Maildir
sudo vi /etc/dovecot/conf.d/10-auth.conf
disable_plaintext_auth = no
auth_mechanisms = plain login
!include auth-system.conf.ext
sudo systemctl restart dovecot

sudo apt install mariadb-server unzip
sudo apt install php php-mysql php-gd php-mbstring php-xml php-intl php-curl

sudo mysql -u root -p
CREATE DATABASE roundcubemail DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
GRANT ALL PRIVILEGES ON roundcubemail.* TO 'roundcube'@'localhost' IDENTIFIED BY 'your_strong_password';
FLUSH PRIVILEGES;
EXIT;

server {
    listen 80;
    server_name mail.example.com;

    root /var/www/roundcube;
    index index.php;

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php8.2-fpm.sock;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;
    }

    location ~ /\.ht {
        deny all;
    }

    location ~ ^/(config|temp|logs)/ {
        deny all;
    }
}

cd /var/www/
wget https://github.com/roundcube/roundcubemail/releases/download/1.6.9/roundcubemail-1.6.9-complete.tar.gz
tar -xzf roundcubemail-1.6.9-complete.tar.gz
mv roundcubemail-1.6.9 roundcube
chown -R www-data:www-data /var/www/roundcube
访问 http://mail.example.com/installer，按向导操作：

Database setup: 填入之前创建的 roundcubemail 数据库信息
IMAP Settings:
IMAP Host: ssl://localhost 或 tls://localhost
Port: 993
SMTP Settings:
SMTP Host: tls://localhost
Port: 587
Use SMTP authentication: 
Username: %u，Password: %p