Blocked senders

Email Security marks all messages from these senders with a disposition.

To configure blocked senders:

1. Log in to Zero Trust ↗.
2. Select Email Security.
3. Select Settings, go to Detection settings > Blocked senders.
4. On the Detection settings page, select Add a sender.
5. Select the Input method: Choose between Manual input, and Upload blocked sender list:
   • Manual input:
     • Sender type:
       • Email addresses: Must be a valid email.
       • IP addresses: Can only be IPv4. IPv6 and CIDR are invalid entries.
       • Domains: Must be a valid domain.
       • Regular expressions: Must be valid Java expressions. Regular expressions are matched with fields related to the sender email address (envelope from, header from, reply-to), the originating IP address, and the server name for the email.
     • Notes: Provide additional information about the blocked sender policy.
   • Upload blocked sender list: Upload a file no larger than 150 KB. The file cannot can only contain Blocked_Sender and Notes fields. The first row must be a header row.
6. Select Save.

Export blocked senders

To export a list of blocked senders:

1. On the Detection settings page, select the blocked senders you want to export.
2. Select Action.
3. Select Export to CSV.

Edit a blocked sender

To edit a blocked sender:

1. On the Detection settings page, select the blocked sender you want to edit.
2. Select the three dots > Edit.
3. Edit the blocked sender.
4. Select Save.

Delete a blocked sender

To delete a blocked sender:

1. On the Detection settings page, select the blocked sender you want to delete.
2. Select the three dots > Delete.
3. On the pop up message, select Delete.

To delete multiple blocked senders at once:

1. On the Detection settings page, under Blocked senders, select the senders you want to delete.
2. Select Action
3. Select Delete.