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ALV_Work's avatar
ALV_Work
Copper Contributor
Apr 10, 2019
Solved

Outgoing emails marked as SPAM and Phishing emails by O365 servers

Hi, Since yesterday, all outgoing emails from our organization using Office365 (fully cloud) are being flagged as either spam or phishing email by Microsoft Outbound email servers. Due to this our...
exchange
office 365
  • Rafmoerkens's avatar
    Rafmoerkens
    Apr 12, 2019

    Philippe_RAYNAUD 

     

    You might want to read the following article on the "health" tab in the office portal...

     

Rnishat0786's avatar
Rnishat0786
Iron Contributor
Apr 10, 2019

ALV_Work 

 

I noticed in the Message Header - 

 http://go.microsoft.com/?linkid=9837881None (protection.outlook.com: gmsuae.com does not designate permitted sender hosts)

 

So would suggest to check if the sender domain is added in the allowed domain settings in Security and Compliance center.

 

1. Sign in to O365 Admin Portal
2. Navigate to Security & Compliance center > Threat management > Policy.
3. Find Anti-spam, open it. Expend Allow lists. Add the sender’s domain to the Allow domain setting.

 

 

ALV_Work's avatar
ALV_Work
Copper Contributor
Apr 10, 2019

HiRnishat0786 ,

 

Thanks for the suggestion. We already have the domain added in the Allow list of Anti-Spam policy. 

 

Could it be that the domain is showing as SPF not designated because it is still an internal email within Office365 servers ? 

 

 

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