What is Invaluement?
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Invaluement is a commercial blocklist service that specializes in catching spam that slips past the bigger lists. If you've cleaned up your act, passed every other check, and still have delivery problems, Invaluement is worth looking at.
What makes it different is its focus on snowshoe spam. That's when senders spread volume across many IPs and domains at once, specifically to stay below the thresholds that trigger Spamhaus and similar lists. Invaluement's trap network is built to spot those distributed patterns instead of just flagging individual high-volume senders.
Invaluement's three main products:
- ivmSIP. IP-based list targeting sending servers directly
- ivmURI. Domain and URI list used for content-level filtering
- ivmSIP/24. Broader network-level listings that flag whole IP ranges
What gets you listed:
- Spam hitting Invaluement's trap network
- Patterns that match professional spam operations
- IPs or domains sharing infrastructure with known spammers
- Ignored abuse complaints
How to check: Use the Invaluement lookup tool to see if your IP or domain is listed.
Delisting: Invaluement doesn't auto-delist. You submit a request at invaluement.com/removal and they review it manually. Be specific about what caused the listing, what you've changed, and why you're a legitimate sender. Vague requests don't move things forward.
The impact level is real but targeted. Not every mail server queries Invaluement, but the ones that do tend to trust it a lot. If you're listed there and a recipient's server checks it, your mail is getting blocked.
Still if you're dealing with a listing right now and not sure where to start, our SOS hotline is free and we'll help you work through it.
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