E-mails sent from Android not syncing to IMAP "Sent" folder

I'm using the stock e-mail app of Android 4.1 (Motorola razr i), and when I send a mail from the phone, the mail app afterwards shows the sent mail in the "Sent" folder, but it seems that folder is not synchronized via IMAP. Thus, I cannot see those mails from my PC e-mail client. Is there any configuration for this, or will I have to use K9 or some other app?