http://smtpfilter.sourceforge.net/esmtp.html
- conflict(8) is deprecated and will be removed from the next release.
- mhtest(8) is deprecated and will be removed from the next release.
+- msh(1) is deprecated and will be removed from the next release.
- 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,