File Dash search should find mail attachments

There are two places where I (and I guess I'm not alone) have my files saved.
1. On the local file system
2. In the mail client (received files that I didn't save locally)

To completely cover the files of interest when searching the Dash File Lens should search mail attachments too.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: unity-lens-files 6.6.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-15.22-generic 3.5.4
Uname: Linux 3.5.0-15-generic x86_64
ApportVersion: 2.5.2-0ubuntu4
Architecture: amd64
Date: Fri Sep 21 12:04:50 2012
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120724.2)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/usr/bin/zsh
SourcePackage: unity-lens-files
UpgradeStatus: No upgrade log present (probably fresh install)