Hello all

An surprising error occur we send a mail through office 365 portal .

"authentication-results: xxx.com; dkim=none (message not signed)

Header.d=none"

Can any body help what are the reason and how to fix that .

Regards

Sunny

Hi,

As this issue is on Office 365 Portal, I suggest you post the question in Office 365 Community forum:

https://community.office365.com/en-us/f/

Regards,

Melon Chen
TechNet Community Su