We have the "Caution! This message was sent from outside your organization." Banners turned on in our email protection.
In the normal user mailboxes the options to allow / block sender is shown.
In the shared mailboxes the banner is shown but the options are missing. This needs to be changed.
With as much spam as Sophos Central allows through (wich is daily more and more), we need the option to be able to block the spam at the source.
Thank you for reaching out.
To clarify the end user allow/block option won't be of much help here, in such cases the admins will have to add the sender to the enterprise block list.
Note the banner's allow/block action is specific to a user, not a group of users of the whole company.
I have shared your feedback with the PM about the email banner.