If you have a large number of email addresses or domains that you would like to add to your Blacklist or Whitelist, you can easily add them all at once in the CanIt portal.

1) Log in to the CanIt portal at https://antispam.roaringpenguin.com/canit/index.php

2) Click on Rules.

3) Click on Bulk Entry.

4) Paste your list of Sender email addresses or Domains into the main form box.  Please note that you cannot add email addresses and domains simultaneously, a separate list will need to be created for each.
5) Add a Global Comment to or Expiry if desired. 
6) Select the type of object and action to be performed from the "Please select an action" menu.
7) Click the Submit Changes button.