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Setting up Spoof Intelligence to let simulated phishing emails through (Microsoft Defender)

Updated

When using Microsoft 365, it is possible that simulated phishing mails cause these warnings to appear:

  • This sender (example@example.com) is from outside your organization

  • We could not verify the identity of the sender. Click here to learn more.

  • The actual sender of this message is different than the normal sender. Click here to learn more

To prevent this warning, you can make use of the Tenant Allow/Block Lists feature in Microsoft 365. Doing so only takes a few minutes and we have prepared a step-by-step guide to make things easy for you.

  1. Log in to your Microsoft Defender with an administrator account.

  2. Expand the Email & collaboration menu, select Policies & rules, and then choose Threat policies.

  3. Under Rules, select Tenant Allow/Block Lists.

Microsoft Defender Tenant Allow/Block Lists page on the Spoofed senders tab, showing an empty list and the Add button used to create a new spoofed sender entry.

  1. Select the Spoofed senders tab and then select Add. A new dialog will open.

Add new domain pairs dialog in Microsoft Defender, with a wildcard entry field containing example domain and IP pairs, Spoof type set to Internal, and Action set to Allow.

  1. In the SoSafe Manager, navigate to Settings / Whitelisting and there select SoSafe mail servers. You must now determine whether your setup is based on individual IP addresses or an IP range. If an IP range is being used, follow the steps on the left. If individual IPs are used, follow the steps on the right.

SoSafe Manager whitelisting page with the SoSafe mail servers section expanded, showing a table of IPv4 range and IPv6 range entries, used when whitelisting an IP range rather than individual addresses.

  1. Go back to the email server portal. In the dialog window you opened (see 4.), you must add the entries in the list provided below. Note that you can only add 20 entries at a time. You must therefore split up the list into 2 add/save procedures.

List of required entries, click to expand

*, 18.153.184.1
*, 18.153.184.2
*, 18.153.184.3
*, 18.153.184.4
*, 18.153.184.5
*, 18.153.184.6
*, 18.153.184.7
*, 18.153.184.8
*, 18.153.184.9
*, 18.153.184.10
*, 18.153.184.11
*, 18.153.184.12
*, 18.153.184.13
*, 18.153.184.14
*, 18.153.184.15
*, 18.153.184.16
*, 18.153.184.17
*, 18.153.184.18
*, 18.153.184.19
*, 18.153.184.20
*, 18.153.184.21
*, 18.153.184.22
*, 18.153.184.23
*, 18.153.184.24
*, 18.153.184.25
*, 18.153.184.26
*, 18.153.184.27
*, 18.153.184.28
*, 18.153.184.29
*, 18.153.184.30

  1. Under Spoof type, select Internal. Under Action, select Allow. Finish the process by selection Add.

SoSafe Manager whitelisting page with its fold-out menu collapsed, listing SoSafe mail servers, Envelope sender addresses, List of used domains in phishing links, List of domains for the e-learning platform, and SoSafe images server, the source for the individual IP entries added next.

  1. Go back to the email server portal. In the dialog window you opened (see 4.), you must add the IPv4 entries shown in the Manager. Following the example in the screenshot, these would be the required entries:
    *, 3.67.54.56
    *, 3.65.81.9

  2. Under Spoof type, select Internal. Under Action, select Allow. Finish the process by selection Add.