sendmail - sendmail emulator interface for nullmailer
sendmail [ flags ] [ recipients ] < message
This program is a front end program for nullmailer-inject. It is used
by programs that expect a sendmail interface for sending email. After
parsing the command-line arguments, this program executes nullmailer-
inject directly. See the documentation for nullmailer-inject for
details on how messages are reformatted and queued.
Sets the full name of the sender.
Sets the envelope sender address.
An alternate and obsolete form of the -f flag.
-t Read message for recipients and ignore the command-line