用win32 api写成的pop3接收邮件的类，带md5加密

邮件加密源代码，可用于数字签名，散列处理-E-mail encryption source code can be used for digital signatures, hashing

Some operating systems support more than one type of hash. In fact, sometimes the standard DES-based algorithm is replaced by an MD5-based algorithm. The hash type is triggered by the salt argument. Prior to 5.3, PHP would determine the available alg

Some operating systems support more than one type of hash. In fact, sometimes the standard DES-based algorithm is replaced by an MD5-based algorithm. The hash type is triggered by the salt argument. Prior to 5.3, PHP would determine the available alg