Upon checking the mail tracking logs, you find out that your email was deleted by the High-Risk Attachment rule.
This article shows you how to stop the rule from deleting what you consider a legitimate mail.
As a workaround to the High-Risk Attachment rule, you can do any of the following options:
- Log on to the HES console.
- Click Inbound Protection tab then Policy.
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Under Rules status, look for "High-risk attachment" and under the Status column, click the Check icon.
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The said icon will now become an x-mark. This means that the rule has been disabled.
You may do the same procedure to the Outbound High-risk attachment rule if you want to.
- Log on to the HES console.
- Click Inbound Protection tab then Policy.
- Select the High-Risk Attachment rule.
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Go to Recipients and Senders > Recipient Exceptions.
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Enter the email address or the domain of the sender on the textbox and click Add.
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The email addresses or the domains will be added to the Selected column.
- Click Save.
- Log on to the HES console.
- Click Inbound Protection tab then Policy.
- Select the High-Risk Attachment rule.
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Go to Scanning Criteria > Advanced.
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Go to the selected "Attachment is" checkbox then click name or extension. The Attachment Names window will appear.
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Tick the checkbox next to File extensions to block (recommended). A list of extensions will be shown.
- Uncheck all the extensions you want to be excluded from scanning.
- Click Save.
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Go back to Advanced section then navigate to the selected "Attachment is" checkbox then click MIME content-type. The Attachment MIME Type window will appear.
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Uncheck all the MIME types you want to be excluded.
- Go back to Advanced section then navigate to the selected "Attachment is" checkbox then click true file type. The Attachment True File Type window will appear.
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Uncheck all the file types you want to be excluded.
- Click Save.
