To disable the "Recent Contacts" feature in Lotus Notes R8.x you have the following options inside your NOTES.INI:
Ignore only Sender's name from emails I receive: DisableDPABCCandToprocessing=1Ignore only the 'To' recipient names from emails I send & recieve: DisableDPABCCprocessing=1
Ignore only names from e-mails I send:
Q. How do you turn off type-ahead?
A. To do this, use these steps:
1. Select File > Preferences, and click on the Basic Notes Client Configuration section. 2. Check the option “Disable type-ahead for all name fields and use the Notes Basic type-ahead.”
To do this for all users, use the Notes.ini $DISABLE_TYPEDOWN=1.
And of course you can publish these settings via the Desktop Policy Document to all your users.