What interface are you using? If office outlook I'd ask here
https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook
or for outlook.com ask here
https://answers.microsoft.com/en-us/outlook_com/forum/oemail
or if live mail ask here
https://answers.microsoft.com/en-us/windowslive/forum/livemail
or for windows 10 mail try asking here.
https://answers.microsoft.com/en-us/windows/forum/apps_windows_10-outlook_mail
--please don't forget to Accept as answer if the reply is helpful--
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows Server] Datacenter Management
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