+- spost(8) has been merged into post(8). Its functionality is
+ enabled by selecting the sendmail/pipe mail transport method in
+ etc/mts.conf, which in turn can be configured using
+ --with-mts=sendmail/pipe. 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 mts: pipe. spost is deprecated and will be
+ removed from the next release.