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Safe Attachments Bypass Rule
Below are the steps to set up a mail flow rule to bypass Safe Attachments Processing.
- Create a new mail flow rule in your Microsoft 365 Exchange admin center.
- Give the rule a name, e.g. Bypass Safe Attachments.
- Click More Options.
- From the 'Apply this rule if…' drop-down, select The senders then select IP address is in any of these ranges or exactly matches.
- Enter our IP addresses. Please see IP Addresses for the most up-to-date list of our IP addresses.
- From the 'Do the following…' drop-down, select Modify the message properties... and then set a message header.
- Click the first *Enter text... link and set the message header to:
- X-MS-Exchange-Organization-SkipSafeAttachmentProcessing
- Click the second *Enter text... link and set the value to:
- 1
- Click the first *Enter text... link and set the message header to:
- To finish, click Save.