It would be much more functional to store all collected addresses in some external addressbook (through Akonadi?). Reproducible: Always Steps to Reproduce: 1. Use some e-mail address Actual Results: E-mail address (only!) is stored in KMail's "recent addresses". Expected Results: E-mail address with all the relevant information (name, ... something more to be extracted?) is stored in an external addressbook.
Thank you for the bug report. As this report hasn't seen any changes in 5 years or more, we ask if you can please confirm that the issue still persists. If this bug is no longer persisting or relevant please change the status to resolved.
I've not been following KDE PIM for a while, but I guess it's not been implemented.