最近学习CBC6，尝试用NMSMTP编制了一个发送邮件工具，网上这方面资料较少。认证方面和附件发送方面的资料更少，经过反复试验成功实现了大附件发送，并非网上说的不能发送大附件。BASE64编码也是用的BCB自带的IDBASE64控件实现，不像网上有些文章还要自己实现BASE64编码.-Recent study CBC6, try NMSMTP developed a tool to send e-mail, web less information in this regard. Certification and attachments such information less successfully achieved through trial and error to send large attachments, not to say the Internet can not send large attachments. BASE64 encoding is used to achieve BCB own IDBASE64 control, unlike the Internet to achieve some articles but also their own BASE64 encoding.