how do I unblock an address?

I blocked an e-mail address , actually a domain,by mistake, how do I unblock?

  1. Open Spam folder, find a mail sent from the address you want to unblock and select it, click on the little arrow near Move to Inbox button and choose “Move to Inbox and remove blacklisted domain”,

  2. Tools - Rules, select Blacklist rule, click Modify rule. New window will appear where you can manage (add/remove/edit) blacklisted addresses/domains.