基于GMIME2.6.11的邮件格式解析以及附件恢复，使用本程序之前，需要先安装GMIME库，本程序使用在Linux系统中，测试与Ubuntu14.04通过(Based on GMIME2.6.11's mail format parsing and attachments recovery, we need to install GMIME library first before using this program. This p