I bet your Outlook program is set to use Internet Mail only, right. For that to work properly you need to re-configure you mail settings to Workgroup and set the profile to use internet settings as default.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
How VR is being used to simulate space
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.