Blocked senders setting

You can automatically reject messages from individual addresses or entire domains by adding those addresses or domains to a Blocked senders list.

Similar to other email security settings, the blocked senders setting applies to all users in an organizational unit. Users within child organizations inherit the settings you create for the parent organization.

Set up a blocked senders list
  1. Sign in to the Google Admin console
  2. From the dashboard, go to Apps > Google Apps > Gmail > Advanced settings
  3. In the Organizations section, highlight your domain or the organizational unit for which you want to configure settings (see Configure advanced settings for Gmail for more details).
  4. Scroll down to the Blocked senders section:
    • If the setting's status is Not configured yet, click Configure (the "Add setting" dialog box displays).
    • If the setting's status is Locally applied, click Edit to edit an existing setting (the "Edit setting" dialog box displays), or click Add another to add a new setting (the "Add setting" dialog box displays).
    • If the setting’s status is Inherited, click View to view the inherited setting, or click Add another to add a new setting (the Add setting dialog box opens).
  5. For additional instructions and guidelines, see the sections below. When you're finished making changes, click Add Setting or Save to close the dialog box.
  6. Click Save changes at the bottom of the "Email settings" page.
Add addresses or domains to the list

After performing the steps above:

  1. Click Use existing or create a new one.
  2. Select the name of an existing list, or enter a custom name for a new list in the Create new list field, and then click Create.
  3. Hover over the list name, and click Edit.
  4. Click Add to add email addresses or domains to the list.
  5. Enter the address or domain name, and click Save.
  6. To add more email addresses or domains to the list, repeat steps 4 and 5.
Edit the default rejection notice

In this field, you can enter customized text for the rejection notice.

Add exceptions to your list 

Check the box in the Options section ("Bypass this setting for messages received from addresses or domains within these approved sender lists") to set up a new approved sender list or to reuse a list that you have already created. An approved sender list enables you to approve messages from specific addresses or domains. When you set up an approved sender list in the Blocked senders setting, messages from domains or email addresses in the list will bypass the Blocked senders setting. Note: Other settings may still cause the message to be blocked.

Note: If a message from an approved sender contains a virus or is part of an email attack, Google's virus filters will still prevent it from reaching your users.

To create an approved sender list:

  1. Check the box in the Options section ("Bypass this setting for messages received from addresses or domains within these approved sender lists").
  2. Click the Use existing or create a new one option.
  3. Select the name of an existing list, or enter a custom name for a new list in the Create new list field, and then click Create.
  4. Hover over the list name, and then click Edit.
  5. Click Add to add email addresses or domains to the list.
  6. Enter an email address or the domain name; for example, solarmora.com.
    Note: Click Do not require sender authentication to bypass the Blocked senders setting for approved senders that do NOT have authentication, such as SPF or DKIM enabled. Use this option with caution; it can potentially lead to spoofing.
  7. Click Save.
  8. To add more email addresses or domains to the list, repeat steps 5–7.
When you're finished, click Add Setting (at the bottom of the dialog box), and then click Save changes (at the bottom of the "Email settings" page) to confirm your changes.