一个在redhat下面做的邮件收发程序，可以实现文本附件发送功能。对于二进制附件或包含base64无法编码识别的字符不能正常发送。重在smtp用法-a redhat below done in the mail process, can achieve this text Annex function. For binary or annex contains base64 encoding unable to identify the characters not normal this. Usage lies smtp