Hi HansonWong4706, Yes, all settings about your Office 365 email services are correct. The NDR reports you provided indicate that the recipient’s mail servers are treating emails as spam due to IP scans. Please let the recipient side ask for help from Hotmail via the link below and check if the issue can be resolved. http://answers.microsoft.com/en-us/outlook_com/forum?auth=1 Thanks for your understanding. Poppy
↧