Package: s-nail Version: 14.8.16-1 heirloom-mailx may have been superseded by s-nail, but the latter fails to provide the /usr/bin/mail and /usr/bin/mailx frontends as the former.
Installing bsd-mailx or mailutils will make those available, but these packages are supposed to be alternatives to s-nail, not supplements to it. Note that the package description for bsd-mailx indicates that this package (s-nail) provides /usr/bin/mail . Also, the s-nail package in Ubuntu Xenial (14.8.6-1 as of this writing) does Provide: mail-reader, mailx .
