Contacts

As an optional feature, our webmail supports collecting, displaying, and searching through contacts.

Import/Export

You can import or export contacts in vCard or CSV format from the webmail interface, under the Contacts tab.

Automatically Collected

Addresses you send emails to from the webmail interface are automatically added to the "Automatically Collected" address book.

This behavior can be disabled under Settings -> Preferences -> Address Book -> Use automatic address book.

CardDAV

See the CardDAV docs.