6.13 Email Control Policy
The email control policy prevents the leakage of sensitive corporate information via email while allowing normal email usage. It applies only to outgoing emails; incoming emails cannot be controlled. Currently, it does not support controlling webmail or Lotus email sending.
| Attribute |
Description |
| Sender |
Controls the sender's email address. Supports wildcards and multiple addresses separated by commas (,) or semicolons (;). |
| Recipient |
Controls the recipient's email address, including CC and BCC. Input rules are the same as for Sender. |
| Match Single Recipient Only |
If checked, the policy applies if at least one recipient matches; if unchecked, all recipients must match. |
| Subject |
Controls the email subject. Input rules are the same as for Sender. |
| Contains Attachment |
Controls whether emails with attachments are affected. If checked, only emails with attachments are controlled; if unchecked, all matching emails are affected, regardless of attachments. |
| Attachment Name |
If "Contains Attachment" is checked, specify attachment names to control. Input rules are the same as for Sender. |
| Email Size (>=KB) |
Controls emails by size. Default is 0 (all emails). Emails equal to or larger than the specified size are affected. |
Policy Example 1
To prevent confidential corporate information from being sent via email, attachment control can be applied. Emails containing attachments with specified keywords in their filenames will be blocked.
Policy Setup: Mode: Block → Contains Attachment → Attachment Name: e.g., *keyword*
Emails sent from the client containing attachments with filenames that include "keyword" will be blocked.
Policy Example 2
Some organizations may restrict outgoing emails to approved internal accounts, blocking all other senders. This ensures proper email usage and tighter control over external communications.
Policy Setup:
① Create a policy: Block All Emails
② Create a policy: Allow → Sender: e.g., *@teclink.com.hk
Only emails sent from addresses containing @teclink.com.hk will be allowed.
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