To remove/edit the spam safe and blocked sender settings for your e-mail, you may easily do so from LinkU WebMail.
Login to the webmail using your e-mail address and password.
Click on the "Settings" option on the upper portion of the webpage.
Select "Anti-Spam Settings" from the provided options.
From this section, you may click to edit your whitelist, which would be allowed senders or e-mail addresses. Or you can click on Blacklist, to block senders or e-mail addresses.
From here, simply add the e-mail address or domain you want to allow or block.