Today we’ve released an improvement on contact management: it is now centralized into the Contacts application. This means:
all of your webmail contacts will be removed from the webmail and migrated into the Contacts application in an address book called Webmail
when you’ll write an email to a new email address it’ll be automatically added to this Webmail address book, so it’s there next time you need it (adjustable in the webmail’s settings).
email address suggestions in the webmail will be based on the Contacts application (already the case).
if you want to sync this address book on your phone you need to go to Settings > Accounts > firstname.lastname@example.org > My Account > Settings > email@example.com > overflow menu (three dots) at the top right of the screen > Refresh address book list