How To Apply Subject For External Mails

In this article, we are going to see how to add a subject for external emails. When I say this, you will have one question - why should we add the Subject for External Mails specifically. Right?

There are a lot of ways spammers are targeting users by using the email address policies which look genuine in nature but are not. We can apply a subject to the External mails using the following procedure, which will give an extra warning for the internal recipients.

Open Exchange Admin Center.

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Click on "Create a new rule".

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Type the name for "Transport Rule" and click on "More Options".

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Select Apply this rule if –> The Sender –> is External/Internal.

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Select "Outside the Organization".

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Select Do the following–> Prepend the subject of the message with...

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Type the text that you want to display in the mails for the internal recipients.

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We need to exclude signed mails which are sent from external because the digitally signed mails should not get intercepted.

To do that, select Except if –> The Message type is –> Signed.

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Once selected, save the rule and wait for 15 to 20 minutes for the rule to get replicated between the Exchange Servers.

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Check any mail coming from the external domains now.

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You can see that the Subject is added with the additional text which was applied through the transport rule.

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