hpvis ~ # emerge -vp spamassassin

These are the packages that I would merge, in order:

Calculating dependencies ...done!
[ebuild   R   ] mail-filter/spamassassin-3.1.0-r2  USE="berkdb doc ldap mysql postgres qmail spf sqlite ssl tools" 0 kB

Total size of downloads: 0 kB
hpvis ~ # USE=razor emerge -vp spamassassin

These are the packages that I would merge, in order:

Calculating dependencies \
!!! All ebuilds that could satisfy "mail-filter/razor" have been masked.
!!! One of the following masked packages is required to complete your request:
- mail-filter/razor-2.67 (masked by: missing keyword)
- mail-filter/razor-2.75 (masked by: missing keyword)
- mail-filter/razor-2.74 (masked by: missing keyword)
- mail-filter/razor-2.77 (masked by: missing keyword)
- mail-filter/razor-2.71 (masked by: missing keyword)
- mail-filter/razor-2.72 (masked by: missing keyword)

For more information, see MASKED PACKAGES section in the emerge man page or
refer to the Gentoo Handbook.
(dependency required by "mail-filter/spamassassin-3.1.0-r2" [ebuild])