Message rejected as spam by Content Filtering

Question

Hello community,

We do have Edge Servers in place before our Exchange Servers. We noticed recently from iPhone devices that mails are being rejected with the status: Diagnostic-Code: smtp; 550 5.7.1 Message rejected as spam by Content Filtering.

I have checked on our Edge Servers and the output of the command is:

C:\Windows\system32>Get-ContentFilterConfig | Format-List Enabled
Enabled : True

What it is strange is the fact that: When a user which is using apple IOS devices is sending a pdf from his/her device using Gmail mail toward our corporate mail the mail is being rejected with 550 5.7.1
• If the user is opening a new mail on Apple devices, and attaching the doc into the mail, the mail is received
• If the user is trying to share a pdf/doc from his/her apple device using GMAIL app and then removing the attachment again the mail is being rejected with 550 5.7.1
So, it seems like iphone+gmail are adding some extra layers. What has changed ? We do not want to disabled Content Filtering.

P.S: We have also noticed but a small nr of cases that the problem is even with Android Phones.

Thank You

Answer 1

Hi, yes i'm using Set-ContentFilterConfig -BypassedSenderDomains xxx.com