When you compose an email in the BlackBerry Hub+ Contacts, contacts that you sent messages to recently appear as suggested recipients under the To field.
In the Contacts app, tap . In the General settings section, tap Contacts management > Manage suggested recipients.
Tap the contact that you don't want to appear as a suggested email recipient.
To view a list of contacts that you removed from being suggested, tap Removed from Inbox App. To allow these contacts to be suggested again, tap them.