+- spost(8) has been merged into post(8). Its functionality is enabled
+ by selecting the sendmail/pipe mail transport method, described in
+ the mh-tailor(5) man page. The spost -noalias, -backup/-nobackup,
+ -push/-nopush, and -remove/-noremove switches are not supported by
+ post. Note that spost did not support -whom or Dcc, and neither
+ does post when using sendmail/pipe. And spost would expand blind
+ aliases and send them in the message; post with sendmail/pipe
+ refuses to do that. For backward compatibility, spost has been
+ replaced by a simple shell script that exec's post -mts
+ sendmail/pipe.