Sent mail on two devices

I have em client on two devices. One device has a free license and the other device has a pro license. Both devices serve the same account. Sent mail from this account shows up only on the device that sends the email, and not on the other device. Is this because the two devices are on different licenses? (Received mail (inbox) shows up on both devices)

problem solved. I needed to add IMAP server and now the sent mail is syncing between the two devices, even though they are on different licenses