HRBL's main philosophy is that anyone can delist a blacklisted IP address or host/domain name. This reduces the effects of false positives besides expiration.
But be careful, because your mailserver will be listed again if another spam, scam or other malware comes from it.
Delisting your mailserver again and again without securing it is a bad idea, because delisting will be blocked while already 2 delistings happened in the past 6 months.
Instead secure your mailserver or force your mail service provider to stop sending out malware.
If you believe your mailserver will not send more malware, delist it using the following form: