I have a contact with two email addresses. Only the latest email address is valid (the other is defunct), but this way, when I view the history of the contact, I see all emails, old and new.
When I go to send an email to this person, I start typing his name “Henry” and EM offers suggestions of both old and new emails. Since the old email doesn’t work any more, I don’t want to use that by mistake. Is it possible to somehow to flag an email address in the contact as “read-only”, that is: only use it for reading / searching / history of what I’ve already got, and never use it for sending?