These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.90 s (backtrack: 0/20).


!!! The ebuild selected to satisfy "mail-mta/sendmail" has unmet requirements.
- mail-mta/sendmail-8.19.0.1::gentoo USE="ssl -berkdb -eai -fips -ldap -mbox -nis -sasl (-selinux) -tcpd -tinycdb -verify-sig"

  The following REQUIRED_USE flag constraints are unsatisfied:
    any-of ( berkdb tinycdb )

  The above constraints are a subset of the following complete expression:
    any-of ( berkdb tinycdb ) fips? ( ssl )

(dependency required by "mail-filter/MailScanner-4.84.5.2::gentoo[-exim,-postfix]" [ebuild])
(dependency required by "=mail-filter/MailScanner-4.84.5.2" [argument])