mail-client/mailx ebuild specifies LICENSE="GPL-2" and HOMEPAGE="http://www. debian.org". The package at debian seems to be http://packages.debian.org/ stable/mail/mailx as the versioning theme seems similar. Debian lists this mailx package as using the OpenBSD license. Is the use of the GPL-2 license a bug? Reproducible: Always Steps to Reproduce: There is also a mailx binary included in net-mail/mailutils that is the GNU mailutils which is GPL-2 licensed.
The mailx license (I have looked at one in header of its main.c, since I didn't find any license text file in the dist tarball) is almost identical to our ${PORTDIR}/licenses/BSD, except for being copyrighted to "Regents of University of California", usage of "University" instead of generic "<ORGANIZATION>, and usage of "Regents" instead of "COPYRIGHT HOLDERS" in disclaimer. Looks like it's pretty much a BSD license. I'll change the ebuilds accordingly. Thanks for the heads-up, Albert.
Change committed.