Linux 下发送邮件

# Centos，安装 mailx
$ yum install -y mailx

# 查看帮助
$ mail --h

 # 生成证书
 $ mkdir ~/.certs
 $ echo -n | openssl s_client -connect smtp.mxhichina.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ~/.certs/ali.crt
 $ certutil -A -n "GeoTrust SSL CA" -t "C,," -d ~/.certs -i ~/.certs/ali.crt
 $ certutil -A -n "GeoTrust Global CA" -t "C,," -d ~/.certs -i ~/.certs/ali.crt
 
 # 查看证书权限
 $ cd ~/.certs && ll
 总用量 80
-rw-r--r-- 1 root root  2277 4月  19 10:47 ali.crt
-rw------- 1 root root 65536 4月  19 10:56 cert8.db
-rw------- 1 root root 16384 4月  19 10:56 key3.db
-rw------- 1 root root 16384 4月  19 10:48 secmod.db

# 验证，显示如下信息表示 SSL 证书配置生成及安装完成 
$ certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ./ -i ali.crt
Notice: Trust flag u is set automatically if the private key is present.

 # 配置邮箱参数，文件末尾添加以下内容
 $ vi /etc/mail.rc
 # ssl 校验设置，配置 SSL 证书就可以注释掉
 # set ssl-verify=ignore
 # 邮箱账户，对方收到邮件时显示的发件人
 set from=daodaotest@xxx.com
 # smtp 服务器地址，不要忘记添加：smtps
 set smtp=smtps://smtp.mxhichina.com:465
 # 邮箱账户
 set smtp-auth-user=daodaotest@xxx.com
 # 邮箱密码，部分邮箱（163）为授权密码而非邮箱密码
 set smtp-auth-password=xxxxx
 # smtp 认证方式。默认是 login
 set smtp-auth=login
 # 设置 nss 配置目录，上一步骤 SSL 证书目录
 set nss-config-dir=~/.certs/

# 发送邮件
$ echo "邮件内容" | mail -s "邮件标题" daodaotest@163.com

# 发送邮件，添加抄送人及附件
echo "邮件内容，请查收" | mail -v -c "daodaotest@163.com，daodaotest@qq.com" -s "邮件标题" -a daodaotest.zip daodaotest@163.com

# /etc/mail.rc 之前配置
set smtp=smtp.mxhichina.com:465

# /etc/mail.rc 修改后的配置
set smtp=smtps://smtp.mxhichina.com:465

 # 脚本内容
 $ cat sendRecFile.sh
 #!/bin/bash
 # 定时给运营同学发送对账单文件
 
 # 使用方法
 usage() {
     printf "Usage: sh %s RE_USERS CC_USERS [DAY]" "$0"
     printf "\n"
    printf "\n\t RE_USERS 收件人，多个收件人之间用逗号分隔"
    printf "\n\t CC_USERS 抄送人，多个收件人之间用逗号分隔"
    printf "\n\t DAY 发送对账文件日期，默认为：T-1"
}

# 判断参数
if [ $# -lt 2 ]; then
    usage
    exit 1
fi

# 收件人
RE_USERS=$1
# 抄送人
CC_USERS=$2
# 对账文件日期
DAY=$3
if [ "X$DAY" == "X" ]; then
    DAY=$(date -d yesterday +%Y%m%d)
fi

# 对账文件路径
RE_PATH="/data/ftp/PE/RUI/response"

# 确定 ‘zip’ 命令位置
ZIPEXE="/usr/bin/zip"
if [ ! -x "${ZIPEXE}" ]; then
    ZIPEXE="/usr/bin/zip"
    if [ ! -x "${ZIPEXE}" ]; then
        printf "Unable to locate 'zip'."
        printf "Please report this message along with the location of the command on your system."
        exit 1
    fi
fi

# 确定 ‘mail’ 命令位置
MAILEXE="/usr/bin/mail"
if [ ! -x "${MAILEXE}" ]; then
    MAILEXE="/usr/bin/mail"
    if [ ! -x "${MAILEXE}" ]; then
        printf "Unable to locate 'mail'."
        printf "Please report this message along with the location of the command on your system."
        exit 1
    fi
fi

# 打包对账单
if [ -d "${RE_PATH}/${DAY}" ]; then
    cp -r "${RE_PATH}/${DAY}" /tmp
    cd /tmp || exit
    ${ZIPEXE} -r "${DAY}.zip" "${DAY}"
else
    printf "Cannot find %s." "${RE_PATH}/${DAY}"
    exit 1
fi

# 发送邮件
printf "您好： \n\n 附件为 %s 对账单文件，请查收。\n" "${DAY}" | ${MAILEXE} -c "${CC_USERS}" -s "[定时自动发送] ${DAY} 对账单文件 " -a "/tmp/${DAY}.zip" "${RE_USERS}"

# 发送完成，删除 zip
if [ -f "/tmp/${DAY}.zip" ]; then
    rm -rf "/tmp/${DAY}.zip"
fi

exit 0

# 使用方法
$ sh sendRecFile.sh
Usage: sh ./sendRecFile.sh RE_USERS CC_USERS [DAY]

         RE_USERS 收件人，多个收件人之间用逗号分隔
         CC_USERS 抄送人，多个收件人之间用逗号分隔
         DAY 发送对账文件日期，默认为：T-1

# 定时任务设置
$ crontab -e
0 9 * * * /root/ops-scripts/sendRecFile.sh daodaotest@163.com daodaotest@163.com  >>/root/ops-scripts/sendRecFile.log