Hi,
in roundcube you have "Archive" icon (next to delete). This action looks for epesi contact with e-mail address from headers ("from" or "to" depending on folder type "inbox" or "sent"). If it's found it copies e-mail to epesi under your and found one contact. What's more it moves mail on imap server to folder "Epesi Archive", so you know what messages you moved to epesi.
Additionally, after this action, you can go to any record with "Emails" tab and paste link to this email too.
Cheers
Paul