Mail Flow - External Message Warning HELP

Anonymous
2019-02-11T17:13:35+00:00

Hello!

I'm trying to setup a mail flow rule for external email messages from non-organization addresses. I have it setup great, however I have it coded so that it displays the yellow background, red boarder etc and it displays perfect in a sample code viewer. However, when I add it to my rule and then send a test message to my email from outside the org, it doesn't display any of these colors. HELP?? I have included my code below. I'm using 0365

<div style="background-color:#FFEB9C; width:100%; border-style: solid; border-color:#9C6500; border-width:1pt; padding:2pt; font-size:10pt; line-height:12pt; font-family:'Calibri'; color:Black; text-align: left;"><span style="color:#9C6500"; font-weight:bold;>CAUTION:</span> This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.</div><br>

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Anonymous
2019-02-11T19:26:52+00:00

Hi BH33,

Thanks for provide the details in your post. About your question, please kindly check following steps to see if it can help you fix this issue:

  1. In Exchange Admin Center, go to mail flow > rules and then click "+" to create a new rule.
  2. Then set the new rule like below picture:

Note: in step 4, please enter following code: 

<p><div style="background-color:#FFEB9C; width:100%; border-style: solid; border-color:#9C6500; border-width:1pt; padding:2pt; font-size:10pt; line-height:12pt; font-family:'Calibri'; color:Black; text-align: left;"><span style="color:#9C6500"; font-weight:bold;>CAUTION:</span> This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.</div><br></p>

I have tested above rule on my side and I can successfully show the warning message(see below picture), if you have any problems when doing so, please feel free to post back and provide us a screenshoot of the detailed information about the rule you created for analysis.

Regards,

Jennifer

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  1. Anonymous
    2020-07-31T01:07:12+00:00

    I may be wrong, but when you set the "Match sender address in message" to "Header" this should solve a lot of spoofing. I believe is is a lot harder to spoof the sender address in the message header.

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  2. Anonymous
    2020-07-30T13:06:16+00:00

    Good day,

    This is a nice rule for adding some awareness, but does it work on spoofing?

    Let's say Someone is able to use (nearly) the same address as an inside mail, does it work?

    Because if not it would lead to false confidence?

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  3. Anonymous
    2020-07-29T13:40:30+00:00

    It's been awhile since I enabled the rule, but I believe it was almost instantaneous.

    You might make sure the rule is turned on.

    This is in the screen that list the rules:

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  4. Anonymous
    2020-07-28T19:58:58+00:00

    this rule is not working for me I applied the same as you showed in your message and I'm not getting anything no warnings i'm not sure why..

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