Mail size filtering settings in a policy detect emails based on their size, number of attachments, and attachment size.
Before you begin
Make sure that on the On-Access Settings page, the Scan Inbound Mails and Scan Outbound Mails options are selected.
You can configure mail size filtering settings for
Gateway policy and
On-Access policy separately. Configure the
Gateway settings for inbound emails and
On-Access settings for outbound emails. For example:
• | To block all inbound emails that contain more than five attachments, configure the Mail Size Filtering settings from the Gateway policy. |
• | To block all outbound emails that contain more than three attachments, configure the Mail Size Filtering settings from On-Access policy. |
| Mail size filtering for on-access scanning is not applicable for mailbox server role. |
Task
1 |
From Policy Manager, select a submenu item that has the anti-virus scanner.
The policy page for the submenu item appears.
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2 |
Select the policy as required from On-Access or Gateway policy:
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Click Master policy or any subpolicy you want to configure, then click List All Scanners tab.
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Click Mail Size Filtering.
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In Activation, select Enable to activate the email size filter settings for the selected submenu item.
| If you add a new filter to the policy, you can specify a time slot when to enable the filter, using What time would you like this to apply drop-down list. |
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In Options, you can use:
• | Default Settings — To view a summary of the mail size option set that is used by default. |
• | Default Gateway Settings — To view a summary of the default mail size option used by gateway policy. |
• | <create new set of options> — To configure mail size filtering options. The options are:
◦ | Instance name — Type a unique name for the mail size filter setting instance. This field is mandatory. |
◦ | Maximum overall mail size (KB) — Specify the maximum size (in kilobytes) that an email message can be. You can specify a value from 2 KB to 2 GB, where the default value is 20,000 KB. |
◦ | Maximum attachment size (KB) — Specify the maximum size (in kilobytes) that the attachments of an email message can be. You can specify a value from 1 KB to 2 GB, where the default value is 4096 KB. |
◦ | Maximum number of attachments — Specify the maximum number of attachments an email message can have. You can specify up to 999, where the default value is 25. |
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• | Edit — To edit the selected option set. |
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In Actions, click Edit. Specify the mail size filter actions to take, if the value exceeds the specified settings for these options:
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Message Size
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Attachment Size
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Attachment Count
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8 |
Click Save to return to the policy page.
| Internal emails are not detected by mail size filtering rules. |
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