Sendmail 8.13.3 does not include the following features:
The DefaultAuthInfo option is replaced by a new ruleset authinfo. Use the new option to return the client-side authentication information
for AUTH.
The UnsafeGroupWrites option of the sendmail.cf file
is deprecated and is replaced with the settings GroupWritableForwardFileSafe and GroupWritableIncludeFileSafe in the DontBlameSendmail option.
