McAfee Security for Microsoft Exchange 8.6.0

Configure signed content settings

Configure settings in a policy to identify emails with signed content and take necessary actions.

Whenever information is sent electronically, it can be accidentally or willfully altered. To overcome this issue, some email software use a digital signature — the electronic form of a handwritten signature.

A digital signature is extra information added to a sender’s message that identifies and authenticates the sender and the information in the message. It is encrypted and acts like a unique summary of the data. Typically, a long string of letters and numbers appears at the end of a received email message. The email software then re-examines the information in the sender’s message, and creates a digital signature. If that signature is identical to the original, the data has not been altered.

If the email message contains a virus, bad content, or is too large, the software might clean or remove some part of the message. The email message is still valid and can be read, but the original digital signature is 'broken'. The recipient cannot rely on the contents of the email message because the contents might also have been altered in other ways. Signed content policies specify how email messages with digital signatures are handled.

Task
1 From Policy Manager, select a submenu item that has the filter.
The policy page for the submenu item appears.
2 Click Master policy or any subpolicy you want to configure, then click List All Scanners tab.
3 Click Signed Content.
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.
4 In Actions, click Edit to specify the filter actions that must be taken when signed content is detected.
5 Click Save to return to the policy page.
Signed content settings are applicable to signed emails and attachments.
6 Click Apply to configure these settings to a policy.