Customize Attachment Defense Settings

About Attachment Defense

Attachment Defense leverages the advanced power of Proofpoint Targeted Attack Protection, the industry’s most effective defense against advanced threats, stops, and blocks malicious URLs. When enabled, attachments contained in the inbound email are compared against Proofpoint’s attachment reputation service. Known bad attachments result in messages being blocked from delivery.

Attachment Defense is available with Spambrella’s Business package and above.


Attachment Defense Sandboxing

When enabled, Attachment Defense Sandboxing will send attachments that are not known to the Attachment reputation service to be sandboxed to determine whether it is safe to deliver. During this time, emails remain queued until either a decision is provided or we exceed the maximum wait time (15 minutes). Once a decision is reached the email is either delivered or blocked.

The vast majority of messages are processed and delivered within 2 minutes.

Attachment Defense Sandboxing is available with Spambrella’s Advanced package and above.


Enable/Disable Attachment Defense

To enable or disable Attachment Defense:

  1. Look under ‘Administration‘ and click Account Management > Features.
  2. Locate the Enable Attachment Defense checkbox.
  3. Check (enable) or uncheck (disable) the checkbox to the right of Enable Attachment Defense.
  4. Click Save.

To enable or disable Attachment Defense Sandboxing:

  1. Look under ‘Administration‘ and click Account Management > Features.
  2. Locate the Enable Attachment Defense Sandboxing checkbox.
  3. Check (enable) or uncheck (disable) the checkbox to the right of Enable Attachment Defense Sandboxing.
  4. Click Save.


Customize Attachment Defense Settings

To access Attachment Defense settings:

  1. Look under ‘Security Settings‘ and click Malicious Content > Attachment Defense.
  2. Adjust your organization’s settings as needed.
  3. Click Save.


Attachment Defense Settings

Safe Senders


You can specify one or more email addresses that should be excluded from future Attachment Defense scanning.