What is Invaluement?

Invaluement is a highly respected commercial blocklist service known for catching spam that slips past other lists. It's particularly effective against sophisticated spam operations like snowshoe spam, where senders distribute volume across many IPs and domains to avoid triggering threshold-based blocklists.

Impact Level: Medium-High. While not as universally deployed as Spamhaus, organizations that use Invaluement tend to trust it heavily. It's often the list that catches elusive, professional spam operations.

Invaluement products:

• ivmSIP - IP-based blocklist targeting sending servers
• ivmURI - Domain/URI blocklist for content filtering
• ivmSIP/24 - Broader network-level listings

What triggers listing:

• Spam hitting Invaluement's extensive trap network
• Patterns indicating professional spam operations
• Domains or IPs associated with deceptive practices
• Failure to respond to abuse complaints
• Shared infrastructure with known spammers

How to check: Visit invaluement.com/lookup

Delisting process: Invaluement takes delisting seriously. Submit a request at invaluement.com/removal explaining:

• What caused the listing
• What you've done to fix it
• Evidence that you're a legitimate sender

Expect thorough review - Invaluement doesn't auto-delist. Their reputation depends on accuracy, so they investigate removal requests carefully.

Invaluement is the seasoned harbor pilot who spots trouble that the lighthouse keeper missed. When the professionals trying to sneak past the usual checkpoints get caught, it's often by Invaluement.