440 lines
13 KiB
Bash
440 lines
13 KiB
Bash
#!/usr/bin/env bash
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#
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# install_exim_sendonly.sh v3.8-stable
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# Exim4 + OpenDKIM + TLS + SASL（send-only）
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# --------------------------------------------------------
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# 🧩 改进特性：
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# ✅ 自动检测并强制启用 587（submission）端口
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# ✅ OpenDKIM PID / Socket 稳定化
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# ✅ 自有 SSL 证书优先，打印有效期
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# ✅ DKIM 输出自动分行，兼容阿里云 / Cloudflare
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# ✅ 保留完整 --help 提示
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# --------------------------------------------------------
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# Author: Pan Haitao @ svc.plus
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#
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set -euo pipefail
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DOMAIN="svc.plus"
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HOSTNAME="smtp.${DOMAIN}"
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SERVER_IP="52.196.108.28"
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EMAIL="no-reply@${DOMAIN}"
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CERT="/etc/ssl/${DOMAIN}.pem"
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KEY="/etc/ssl/${DOMAIN}.key"
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DKIM_SELECTOR="mail"
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DKIM_KEY_DIR="/etc/opendkim/keys/${DOMAIN}"
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SASL_PASS_FILE="/etc/exim4/passwd"
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TMP_PASS="$(openssl rand -base64 12)"
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ACTION="${1:-help}"
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TO_EMAIL="${2:-}"
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log(){ echo -e "\033[1;36m$*\033[0m"; }
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die(){ echo "❌ $*"; exit 1; }
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check_root(){ [ "$EUID" -eq 0 ] || die "请用 root 运行"; }
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# ------------------ 安装依赖 ------------------
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ensure_packages(){
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log "📦 安装依赖..."
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apt update -qq
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DEBIAN_FRONTEND=noninteractive apt install -y \
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exim4-daemon-heavy mailutils \
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opendkim opendkim-tools \
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sasl2-bin libsasl2-modules \
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dnsutils curl openssl
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}
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# ------------------ SSL 检测 ------------------
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verify_cert(){
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if [[ -f "$CERT" && -f "$KEY" ]]; then
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log "🔐 使用自有 SSL 证书：$CERT"
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openssl x509 -noout -subject -dates -in "$CERT" || true
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else
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log "⚠️ 未检测到 /etc/ssl/${DOMAIN}.pem/key，将使用默认自签名"
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fi
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}
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# ------------------ Exim 主配置 ------------------
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deploy_exim(){
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verify_cert
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log "🚀 写入 Debconf 主配置（split 模式）..."
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tee /etc/exim4/update-exim4.conf.conf >/dev/null <<EOF
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dc_eximconfig_configtype='internet'
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dc_other_hostnames='${HOSTNAME}'
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dc_local_interfaces='0.0.0.0'
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dc_readhost='${DOMAIN}'
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dc_relay_domains=''
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dc_minimaldns='false'
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dc_relay_nets=''
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dc_smarthost=''
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CFILEMODE='644'
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dc_use_split_config='true'
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dc_hide_mailname='true'
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dc_mailname_in_oh='true'
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dc_localdelivery='mail_spool'
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EOF
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log "🧩 注入 MAIN_* 宏..."
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mkdir -p /etc/exim4/conf.d/main
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tee /etc/exim4/exim4.conf.localmacros >/dev/null <<EOF
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MAIN_HARDCODE_PRIMARY_HOSTNAME = ${HOSTNAME}
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MAIN_TLS_ENABLE = true
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MAIN_TLS_CERTIFICATE = ${CERT}
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MAIN_TLS_PRIVATEKEY = ${KEY}
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MAIN_TLS_ADVERTISE_HOSTS = *
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MAIN_DAEMON_SMTP_PORTS = 25 : 587
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MAIN_TLS_ON_CONNECT_PORTS = 465
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MAIN_FORCE_IPV4 = yes
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MAIN_MILTER = inet:localhost:8891
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MAIN_MILTER_COMMAND_TIMEOUT = 30s
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MAIN_MILTER_CONNECT_TIMEOUT = 5s
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MAIN_MILTER_MAIL_MACROS = i {mail_addr} {client_addr} {client_name} {auth_type} {auth_authen}
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MAIN_MILTER_RCPT_MACROS = i {rcpt_addr}
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EOF
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}
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inject_main_block(){
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local F="/etc/exim4/conf.d/main/02_exim4-config_options"
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log "🛠 注入 MAIN 宏展开片段..."
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grep -q "MAIN_DAEMON_SMTP_PORTS" "$F" || cat <<'EOF' >> "$F"
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# --- Added by install_exim_sendonly.sh (ports) ---
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.ifdef MAIN_DAEMON_SMTP_PORTS
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daemon_smtp_ports = MAIN_DAEMON_SMTP_PORTS
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.endif
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.ifdef MAIN_TLS_ON_CONNECT_PORTS
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tls_on_connect_ports = MAIN_TLS_ON_CONNECT_PORTS
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.endif
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.ifdef MAIN_TLS_ADVERTISE_HOSTS
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tls_advertise_hosts = MAIN_TLS_ADVERTISE_HOSTS
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.endif
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# --- End (ports) ---
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EOF
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grep -q "MAIN_MILTER" "$F" || cat <<'EOF' >> "$F"
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# --- Added by install_exim_sendonly.sh (milter) ---
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.ifdef MAIN_MILTER
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milter = MAIN_MILTER
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milter_command_timeout = MAIN_MILTER_COMMAND_TIMEOUT
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milter_connect_timeout = MAIN_MILTER_CONNECT_TIMEOUT
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milter_mail_macros = MAIN_MILTER_MAIL_MACROS
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milter_rcpt_macros = MAIN_MILTER_RCPT_MACROS
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.endif
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# --- End (milter) ---
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EOF
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}
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# ------------------ DKIM ------------------
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deploy_dkim(){
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log "🔏 配置 OpenDKIM..."
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mkdir -p "${DKIM_KEY_DIR}"
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cd "${DKIM_KEY_DIR}"
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if [ ! -f "${DKIM_SELECTOR}.private" ]; then
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opendkim-genkey -s "${DKIM_SELECTOR}" -d "${DOMAIN}"
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chown opendkim:opendkim "${DKIM_SELECTOR}.private" "${DKIM_SELECTOR}.txt"
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chmod 600 "${DKIM_SELECTOR}.private"
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fi
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tee /etc/opendkim.conf >/dev/null <<EOF
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Syslog yes
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UMask 002
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Mode sv
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Background yes
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PidFile /run/opendkim/opendkim.pid
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Canonicalization relaxed/simple
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SubDomains no
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KeyTable /etc/opendkim/key.table
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SigningTable /etc/opendkim/signing.table
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ExternalIgnoreList refile:/etc/opendkim/trusted.hosts
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InternalHosts refile:/etc/opendkim/trusted.hosts
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Socket inet:8891@localhost
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UserID opendkim
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EOF
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tee /etc/opendkim/key.table >/dev/null <<EOF
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${DKIM_SELECTOR}._domainkey.${DOMAIN} ${DOMAIN}:${DKIM_SELECTOR}:${DKIM_KEY_DIR}/${DKIM_SELECTOR}.private
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EOF
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tee /etc/opendkim/signing.table >/dev/null <<EOF
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*@${DOMAIN} ${DKIM_SELECTOR}._domainkey.${DOMAIN}
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EOF
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tee /etc/opendkim/trusted.hosts >/dev/null <<EOF
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127.0.0.1
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localhost
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${DOMAIN}
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EOF
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chown -R opendkim:opendkim /etc/opendkim
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}
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# ------------------ SASL ------------------
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deploy_sasl(){
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log "🔐 配置 SASL..."
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local HASHED_PASS
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HASHED_PASS="$(openssl passwd -apr1 "${TMP_PASS}")"
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echo "${EMAIL}:${HASHED_PASS}" > "${SASL_PASS_FILE}"
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chown root:Debian-exim "${SASL_PASS_FILE}"
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chmod 640 "${SASL_PASS_FILE}"
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}
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# ------------------ 启用自管 AUTH 登录 ------------------
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enable_auth_login() {
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log "🧩 启用自管 AUTH LOGIN / PLAIN 模式..."
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mkdir -p /etc/exim4/conf.d/auth
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# 禁用系统自带的 PLAIN server，避免命名冲突
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if [ -f /etc/exim4/conf.d/auth/30_exim4-config_plain_server ]; then
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mv /etc/exim4/conf.d/auth/30_exim4-config_plain_server \
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/etc/exim4/conf.d/auth/30_exim4-config_plain_server.disabled 2>/dev/null || true
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fi
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# 写入自定义 authenticator
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tee /etc/exim4/conf.d/auth/30_local_login >/dev/null <<'EOF'
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# --- Added by install_exim_sendonly.sh (AUTH LOGIN/PLAIN) ---
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local_plain:
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driver = plaintext
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public_name = LOCAL_PLAIN
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server_condition = ${if crypteq{$auth2}{${extract{2}{:}{${lookup{$auth1}lsearch{/etc/exim4/passwd}{$value}{no}}}}}}{yes}{no}}
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server_set_id = $auth1
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local_login:
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driver = plaintext
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public_name = LOGIN
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server_prompts = "Username:: : Password::"
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server_condition = ${if crypteq{$auth2}{${extract{2}{:}{${lookup{$auth1}lsearch{/etc/exim4/passwd}{$value}{no}}}}}}{yes}{no}}
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server_set_id = $auth1
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# --- End (AUTH) ---
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EOF
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update-exim4.conf
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systemctl restart exim4
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if swaks --server 127.0.0.1:587 --quit-after EHLO 2>/dev/null | grep -q "AUTH"; then
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log "✅ AUTH LOGIN 已启用"
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else
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log "⚠️ AUTH 未广播，请检查 /etc/exim4/conf.d/auth/30_local_login"
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fi
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}
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# ------------------ 重启与 fallback ------------------
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build_and_restart(){
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log "⚙️ 生成配置并重启..."
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systemctl daemon-reexec
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systemctl daemon-reload
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systemctl enable opendkim
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systemctl restart opendkim
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update-exim4.conf || true
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systemctl restart exim4
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# ---- 强制 fallback 修复 ----
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sleep 1
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if ! ss -tlnp | grep -E '(:587)\s' >/dev/null; then
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log "⚠️ Exim 未监听 587，强制追加 fallback..."
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local F="/etc/exim4/conf.d/main/02_exim4-config_options"
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cat <<'EOF' >> "$F"
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# --- Fallback added by install_exim_sendonly.sh v3.8 ---
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daemon_smtp_ports = 25 : 587
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tls_on_connect_ports = 465
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tls_advertise_hosts = *
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# --- End fallback ---
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EOF
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update-exim4.conf || true
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systemctl restart exim4
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fi
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if ss -tlnp | grep -E '(:25|:587)\s' >/dev/null; then
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log "✅ Exim 已监听 25 与 587 端口"
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else
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log "❌ Exim 未监听 587，请检查 /etc/exim4/conf.d/main/02_exim4-config_options"
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fi
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}
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# ------------------ DNS 输出 ------------------
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show_dns_record(){
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log "🌐 生成最小可信 DNS 模板..."
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local DKIM_TXT DKIM_PUB LINE LEN=255
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if [[ -f "${DKIM_KEY_DIR}/${DKIM_SELECTOR}.txt" ]]; then
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DKIM_TXT=$(tr -d '\n' < "${DKIM_KEY_DIR}/${DKIM_SELECTOR}.txt" | sed 's/"//g' | tr -d '\r')
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DKIM_PUB=$(echo "${DKIM_TXT}" | sed -n 's/.*p=\(.*\)$/\1/p' | tr -d ' ')
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else
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DKIM_PUB="<DKIM 公钥未生成>"
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fi
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echo
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echo "🌐 DNS 模板（兼容阿里云 / Cloudflare）"
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echo "----------------------------------------------------------"
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echo "A smtp.${DOMAIN} ${SERVER_IP}"
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echo "MX ${DOMAIN} smtp.${DOMAIN}."
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echo "SPF @ \"v=spf1 a:smtp.${DOMAIN} -all\""
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echo -n "DKIM ${DKIM_SELECTOR}._domainkey "
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echo "\"v=DKIM1; k=rsa; p="
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while [[ -n "$DKIM_PUB" ]]; do
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LINE=${DKIM_PUB:0:$LEN}
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DKIM_PUB=${DKIM_PUB:$LEN}
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echo "\"${LINE}\""
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done
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echo "DMARC _dmarc \"v=DMARC1; p=none; rua=mailto:postmaster@${DOMAIN}\""
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echo "rDNS (请让 ${SERVER_IP} 反查为 ${HOSTNAME})"
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echo "HELO (EHLO/HELO 输出应为 ${HOSTNAME})"
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echo "----------------------------------------------------------"
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}
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# ------------------ 应用端配置 ------------------
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show_app_config(){
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cat <<EOF
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📦 应用端 SMTP 配置：
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----------------------------------------------------------
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smtp:
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host: "${HOSTNAME}"
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port: 587
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username: "${EMAIL}"
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password: "${TMP_PASS}"
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from: "XControl Account <${EMAIL}>"
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tls:
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mode: "auto"
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insecureSkipVerify: false
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auth: "login"
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----------------------------------------------------------
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EOF
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echo "首发密码（仅本次显示）：${TMP_PASS}"
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}
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# ------------------ 自检 ------------------
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check_self(){
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log "🔍 自检 SPF / DKIM / DMARC / rDNS / HELO / 端口 ..."
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echo
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echo "SPF:"; dig +short TXT ${DOMAIN} | grep -i spf || echo "⚠️ 未配置 SPF"; echo
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echo "DKIM:"; dig +short TXT ${DKIM_SELECTOR}._domainkey.${DOMAIN} || echo "⚠️ 未配置 DKIM"; echo
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echo "DMARC:"; dig +short TXT _dmarc.${DOMAIN} || echo "⚠️ 未配置 DMARC"; echo
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echo "rDNS:"; dig +short -x ${SERVER_IP} || echo "⚠️ 未配置反向解析"; echo
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echo "端口监听："; ss -tlnp | grep -E '(:25|:465|:587)\s' || echo "⚠️ SMTP 未监听全部端口"; echo
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echo "OpenDKIM 8891："; ss -tlnp | grep ':8891 ' || echo "⚠️ 8891 未监听"; echo
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echo "OpenDKIM testkey："; opendkim-testkey -d "${DOMAIN}" -s "${DKIM_SELECTOR}" -vvv || true
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}
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enforce_tls_certificate() {
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log "🔒 强制加载自有 TLS 证书 (${CERT})..."
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sed -i '/tls_certificate/d' /etc/exim4/conf.d/main/02_exim4-config_options 2>/dev/null || true
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sed -i '/tls_privatekey/d' /etc/exim4/conf.d/main/02_exim4-config_options 2>/dev/null || true
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echo "tls_certificate = ${CERT}" >> /etc/exim4/conf.d/main/02_exim4-config_options
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echo "tls_privatekey = ${KEY}" >> /etc/exim4/conf.d/main/02_exim4-config_options
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update-exim4.conf
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systemctl restart exim4
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log "✅ 已更新并加载 ${CERT} (${HOSTNAME})"
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}
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set_auth_credentials() {
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local USERNAME="${1:-${EMAIL}}"
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local PLAINTEXT="${2:-${TMP_PASS}}"
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[ -n "$USERNAME" ] || die "USERNAME 不能为空"
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[ -n "$PLAINTEXT" ] || die "PASSWORD 不能为空"
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log "🔐 写入 AUTH 凭据（哈希）到 /etc/exim4/passwd ..."
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# 使用 SHA-512 crypt 取代 MD5 apr1
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local HASH
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HASH="$(openssl passwd -6 "${PLAINTEXT}")"
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printf '%s:x:%s\n' "${USERNAME}" "${HASH}" > /etc/exim4/passwd
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chown root:Debian-exim /etc/exim4/passwd
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chmod 640 /etc/exim4/passwd
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# 自测哈希匹配
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local PROBE
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PROBE="$(exim -be "\${if crypteq{${PLAINTEXT}}{${HASH}}{yes}{no}}")" || PROBE="no"
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if [ "$PROBE" = "yes" ]; then
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log "✅ 密码哈希校验通过（SHA-512 crypt）"
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else
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die "❌ 密码哈希校验失败，请检查 openssl passwd 生成是否异常"
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fi
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update-exim4.conf
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systemctl restart exim4
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}
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# ------------------ 卸载 ------------------
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uninstall_reset(){
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log "🧹 停止并清理（不碰 /etc/ssl/*）..."
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systemctl stop exim4 || true
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systemctl stop opendkim || true
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rm -rf /etc/exim4 /var/spool/exim4 /var/log/exim4
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rm -rf /etc/opendkim /var/run/opendkim
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apt purge -y exim4* opendkim* mailutils sasl2-bin || true
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apt autoremove -y || true
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log "✅ 已清理完成（证书未动）。"
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}
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# ------------------ 主流程 ------------------
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check_root
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case "${ACTION}" in
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deploy)
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ensure_packages
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deploy_exim
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inject_main_block
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deploy_dkim
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deploy_sasl
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enforce_tls_certificate
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set_auth_credentials
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enable_auth_login
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build_and_restart
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show_dns_record
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show_app_config
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;;
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upgrade)
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log "⬆️ 更新配置并重启..."
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deploy_exim
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inject_main_block
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deploy_dkim
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deploy_sasl
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enforce_tls_certificate
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set_auth_credentials
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enable_auth_login
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build_and_restart
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show_dns_record
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show_app_config
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;;
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show)
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case "${2:-}" in
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dns_record) show_dns_record ;;
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app_config) show_app_config ;;
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*) echo "用法: $0 show {dns_record|app_config}" ;;
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esac
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;;
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check)
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case "${2:-}" in
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self)
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check_self
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;;
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send_email)
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send_test_email() {
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local TO="${3:-}"
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[ -z "$TO" ] && die "请提供收件人邮箱"
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log "📧 发送测试邮件到 ${TO}..."
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echo "Test from ${EMAIL}" | mail -s "✅ Exim Send-Only + DKIM + TLS Test" "$TO"
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echo
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echo "📄 查看日志：tail -n 30 /var/log/exim4/mainlog"
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}
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send_test_email "$@"
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;;
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*)
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echo "用法: $0 check {self|send_email 收件人邮箱}"
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;;
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esac
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;;
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uninstall|reset)
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uninstall_reset
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;;
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help|--help|-h)
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echo "用法: $0 {deploy|upgrade|show dns_record|check self|uninstall}"
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;;
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*)
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echo "用法: $0 {deploy|upgrade|show dns_record|check self|uninstall}"
|
||
;;
|
||
esac
|
||
|