Manage Incoming Sender Block list

Incoming mail received from senders listed in the Sender Block list will always be blocked, regardless of the message classification. In the Admin Level, Domain Level or Email Level Control panel, select Incoming - Protection Settings > Sender Block list.

There are up to three tabs displayed:

  • Sender Block list - Domain - This tab allows you to manage the sender blocked list for your domain. On this tab you can:
    • Block sender - Add a sender to the Block list for the specific domain. See Blocked senders - Domain tab
    • Import senders from CSV - Import a list of senders to add to the Block list for the specific domain via CSV file
    • Export senders as CSV - Export the list of senders to a CSV file
  • Sender Block list - Admin (only available at the Admin Level) - Anything applied on this tab applies to all domains for the selected Admin User. On this tab, you can:
    • Block sender - Add a sender to the Block list for an Admin. See Blocked senders - Admin tab
    • Import senders from CSV - Import a list of senders to add to the Block list via CSV file
    • Export senders as CSV - Export the list of senders to a CSV file
  • Blocked senders - Recommended -This tab allows you to view any inherited blocked senders that have been applied by a higher level admin

At the Email level there are no additional tabs - just the main page (see Manage Sender Block list - Email Level).

Block Sender

Blocked senders - Domain tab

  1. Click on Block sender to open the dialog:
  2. If you are accessing this from the Admin Level, the Domain dropdown is displayed: select the relevant domain
  3. In the Local-part field, specify the local-part of the recipient address at the domain or leave blank to apply the Block listed sender to the whole domain

    To apply the entry to user1@my-domain.invalid, only enter user1 in the local part. To apply to all users at the domain, leave this box blank.

  4. Choose which address you want to apply the block to by selecting from the following Sender Flags:
    • Apply to Envelope Sender - The SMTP Envelope sender from address only
    • Apply to From: Address - The MIME message header from address only
    • Apply to both - both the SMTP Envelope sender from address and the MIME message header from address
  5. In the Address field, enter the email address of the sender you want to block

    To add a whole domain to the sender Block list, enter the domain in the format: domain-to-allowlist.invalid. There is no need to include a wildcard or the @ of the address.

  6. Click on Save to add the sender

Blocked senders - Admin tab

  1. Click on Block sender to open the dialog:
  2. Select the Admin User, this means the blocked sender will apply to all domains assigned to this Admin
  3. Choose which address you want to apply the block to by selecting from the following Sender Flags:
    • Apply to Envelope Sender - The SMTP Envelope from address only
    • Apply to From: Address - The MIME message address only
    • Apply to both - both the SMTP Envelope from address and the MIME message address
  4. In the Address field, enter the email address of the sender you want to block

    To add a whole domain to the sender Block list, enter the domain in the format: domain-to-allowlist.invalid. There is no need to include a wildcard or the @ of the address.

  5. Click on Save to add the sender

Edit Blocked Sender

  1. Click the arrow to the left of the domain to open the action menu for the blocked sender
  2. Select the Edit to amend any of the fields configured during adding
  3. Click on Save to edit the sender

If you Copy Sender, this will take you to add a new entry with the sender address pre-filled from the existing entry.

Remove Blocked Sender

  1. Click the arrow to the left of the domain to open the action menu for the blocked sender
  2. Select the Remove
  3. Confirm removal of the blocked sender