Si.Mail is a software that is freeware email written by clients in Delphi. It has edition capability of HTML messages which is filtered to remove Java script before it is sent to renderer. It has with and without access to SMTP POP3. It provides many vital features required for a client in a tiny package. It is a small size package of around 4.3 MB used for communications and is a Email software. Here Si stands for Service indication or Service loading and works well on Windows and is a open source application. It also supports multiple mail accounts and advanced message search options.