I have a question similar to this one but slightly different.
Some of my contacts have two mail address, an old one I shouldn't write to if I expect an answer and a new one.
Now, I do not wish to delete the old address because I still want google to find the older mails exchanges whenever I perform a search on this user.
Is there a way to tell gmail though that it shouldn't offer this address as a possibility when I start typing the name of my contact? (in other words, use this address for search only)