““download the source you must select a file appropriate to your needs from the many that are listed. In addition to selecting the version of sendmail you want, you must choose between two forms of compressed tar(1) distributions. Those that end in . Z are compressed withUnix compress(1); those that end in . gz are compressed withGNU gzip(1). The latter is the preferred form because the file is smaller and therefore quicker to transfer. In addition to the two forms of distribution, each release has a PGP signature file associated withit.* Prior””
