[gcrump]

I've been using Mailtags and a script to go back to the email.

From with in Mail I use the Copy Message URL command that is added to the Edit Menu after installing MailTags. Then I use the following script within OO to bring the email back:

tell application "OmniOutliner Professional"
tell front document
set theRow to first selected row
set theNote to the note of theRow
set messageURL to first paragraph of theNote
open location messageURL
end tell
end tell