In previous versions, the MIMEDefang ebuilds restricts Postfix to 2.4 and higher versions, with DEPEND="!<mail-mta/postfix-2.4" But in the 2.71 version, the condition changed to: DEPEND=">=mail-mta/postfix-2.4" Now, the update always tries to install mail-mta/postfix. But the mta condition is covered with DEPEND="|| ( mail-filter/libmilter mail-mta/sendmail )" Since I've installed mail-mta/sendmail, which blocks mail-mta/postfix, I can no longer install/update MIMEDefang in my Gentoo system. Since there's no Postfix version before 2.4 left in the Portage tree, it's safe to remove that condition, and allow once again to use MIMEDefang with a MTA that's not Postfix.
+ 16 Jun 2011; Eray Aslan <eras@gentoo.org> mimedefang-2.71.ebuild: + Fix unconditional DEPEND on postfix - bug #371853 + Thanks for the bug report.