Source distributions of Postfix are available from http://www.postfix.org.
Postfix is also available in various Linux and Unix package formats. Several Linux distributions ship with Postfix. Packages are also available from http://www.postfix.org/packages.html.
To get Postfix:
Download the current official release and save it to a convenient directory.
Instructions for compiling and installing Postfix from source the are available in the INSTALL file contained in the source tarball.
- Create dedicated "postfix" and "postdrop" user accounts to make Postfix functional. These accounts do not require login access.