The Invaluement blocklist is made up of three commercial anti-spam blocklists.
- ivmURI: This lists URIs (including both domains and a few IP addresses) owned by spammers.
- ivmSIP: Spammy IP addresses either overlooked or not yet listed by Spamhaus, from botnets, elusive snowshoe spammers, or black-hat mailbox providers. A black hat sender is a company that sends email to recipients who have not given permission to senders to send to them.
- ivmSIP/24: IP address ranges or sub-nets where spam-sending patterns have been detected.
Rather than using spam traps, Invaluement monitors web hosts to get complaint information from the web host; this information is used to generate listings. Invaluement listings are factored into many anti-spam reputation systems.
- Listings occur at the IP address and domain level, depending on the different lists.
- Impact on deliverability is low.
Reasons for getting listed
Your IP address or domain may be listed if:
- It has high subscriber complaint rates
- It has high Mailbox Provider (MBP)-marked spam rates
- It is sending spam
- It is part of a known range of IP addresses or domains that have been classified as legitimate spammers
- It is sending URLs that have been identified as malicious
How to get off this blocklist
To request removal, go to the Delist Requests page and follow the instructions on the lookup form.
If senders are listed on the ivmURI list, they are most often known spammers who own the listed domains. However, a legitimate domain can sometimes be hacked by spammers and end up on the ivmURI list. If your domain is listed, make sure it has been restored and secured before requesting removal.
If senders are listed on the ivmSIP/24 list, they can be removed if:
- Invaluement doesn't have spam on file from the individual IP addresses, but only has spam from nearby IP addresses.
- The nearby spam-sending IP addresses are not sending the same campaigns and are not under the direct control of the IP address owner who is requesting delisting.