Move sent emails to sent folder?

Hello all!

I have a server running dovecot & postfix. I have a user on my server who is sending email via smtp on an HP printer and because of that, a copy of the email is not placed in the sent folder like usually happens with clients like outlook and thunderbird.

Is there any way to have the sent emails copied to the sent folder for just this user on my server?

Thx!

Austin Witmer