We require all Pobox accounts have spam protection. This is because delivering spam to your forwarding address makes it hard for us to deliver real mail there.
Most ISPs use reputation information to determine whether to send mail to your Inbox or your Spam folder. The more spam it receives from a particular location, the more likely it is to declare all mail from that location spam.
Releasing mail from the Spam section sends it to your forwarding address, just as if we had never caught it in the first place. For that reason, there is a limit on how much spam you can release.
If you have a special reason you need to release spam, please contact us to discuss it.