Not possible to send mails from iOS device


Normally, we just sync the calendar and contacts between GroupWise and iOS devices with GW Mobility Service. It's working fine. For a special reason, we also need to sync email to some iOS devices. So I activated the mail checkbox in GSM configuration/GroupWise.

I get the mails (Inbox...) on my iPad now, that's fine. But I can't send new mails from the iPad to any recipient. I press the send button on apple mail app and have no error, but the mail just go to nowhere.

Does it need any more configuration work than just activate the mail checkbox in GSM that I can send new mails from iPad?

Thanks and Regards