RDEPEND="mail-mta/qmail" makes it incompatible with qmail-ldap and qmail-mysql I suggest the same rdepend that is used in ezmlm: RDEPEND="|| ( mail-mta/qmail mail-mta/qmail-mysql mail-mta/qmail-ldap )" I applied this to my server, no unforseen consequences (thus far).
all ezmlm-* packages now depend on virtual/qmail thank you for the report.