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
    2021-09-14T02:45:12+00:00

    Hi Jen,

    Thank you for your response.

    As indicated on my last post, we are able to implement this also. Everything is working fine, but we do have one issue that we can't resolve. We have an existing on-premise microsoft exchange server, User A have an account on on-premise and on 365. Here is the setup:

    1. User A and User B have an account both on on-premise exchange server and exchange online
    2. On-premise exchange server domain: domain.com
    3. Exchange Online domain: domainph.com
    4. Created the rule on exchange online, and add in the exemption the domain "domain.com"
    5. Created a rule on on-premise exchange server of forwarding emails from User_@domain.com to User_@domainph.com
    6. When User_@domainph.com emailed User_@domain.com, email should be forwarded to User_******@domainph.com
    7. User_@domainph.com received the email of User_@domainph.com (email forwarded from User_******@domain.com), however User_A@domainph also received warning indicating the rule created from Exchange Online, meaning bullet no. 4 from above is not working.

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