When writing part of a name in the recipient field, some contact suggestions appear. Then we have to choose one among some outdated email contacts or some picked from emails received with address typo in Cc.
In order to suggest the best one first, I think these sorting rules could be used:
- contacts from sent mails first
- latest sent mails first
- for contacts from received emails, most frequent occurences first

About the format of the recipient contact, we often have this because of Outlook emails:
    "contact.name@company.com" <contact.name@company.com>
The first part is useless and could be automatically converted to
    contact.name@company.com
It would be simpler to visually parse.

Thanks