Sendmail 8.15.1 is available from ftp.sendmail.org. The release has a gzipped tar file and a PGP signature file. The compressed/gzipped tar files are signed by the 2014 signing key PGP signature file. See the security page for more information about how releases are signed.
Important: Before downloading, please review the sendmail licensing terms.
Sendmail also provides the Sentrion Message Processing Engine (MPE) which comes packaged as hard or virtual appliance and includes the sendmail MTA. In addition to all of the standard sendmail features, it provides automated binary installation, graphical configuration and management tools, policy management, flow control, and supports dozens of applications found in the Sentrion Application Store.