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Inbound allow list bypassing all security checks?

Andrew Kartsev

We use MailChimp to send comms to our business and Sophos Email Gateway blocks messages from it with reasoning "Bulk".

Mailchimp uses our Domain name as an envelop, so we whitelist the address "comms@domainname.com" to allow messages to be delivered.

However if I understand it correctly adding sender in inbound allow list means it will skip all security checks (including SPF/DKIM/DMARC) which means this particular address "comms@domainname.com" can easily be spoofed now?

If that's right then is there a way to customize what checks to skip (Bulk in this case) and what to leave in place?



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[edited by: Raphael Alganes at 3:17 AM (GMT -7) on 7 Jun 2023]
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    I think the best work-around for this would be to create a separate policy for the specific email and remove checks on 'Bulk' emails. Then add your generic spoofing protection features (i.e. SPF/DKIM/DMARC). Not ideal but I'm sure it would work as a quick fix? Let me know how it goes as I can see this being an issue for myself in future.

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    I think the best work-around for this would be to create a separate policy for the specific email and remove checks on 'Bulk' emails. Then add your generic spoofing protection features (i.e. SPF/DKIM/DMARC). Not ideal but I'm sure it would work as a quick fix? Let me know how it goes as I can see this being an issue for myself in future.

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