Can't find the right mail in your inbox? What about being able to search your mail & archives and provide granular search strings? Our ICS Services team has created an Asset which you can use. It's a plug-in to be installed in Notes Client, and makes searching your mail & archives easier. It will continue to leverage the same Full-text index that is used by the client, but makes it easier to specify field values, like specifying "subject contains xxxx" and "sender is yyy" etc.
You can get more information about this -> https://www-304.ibm.com/connections/blogs/87f3fbd1-c0ec-4f28-be5b-39e1a20ef11b/entry/new_asset_ibm_notes_extended_search_plugin_for_ibm_notes_9_available?lang=en_us
If you would like to try this, you will need to get in touch with your local ISSC rep (link is also given on that page).