Scan and add recipients to autocomplete recipient list from existing sent folder

Hi,
for new “switching-to-emClient” users a feature where an existing sent-folder is scanned and all recipients are added to the “autocomplete recipient list” of the emClient would be nice.
What do you think?
Stefan

Hi,

What client have you been using before and want to import contacts from?

-Dave

Hi Dave,
I’ve used Thunderbird before. Best would be, that all recipients of my IMAP folder “sent messages” ist used.
Stefan

Please solution?