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What is the Trend Micro blacklist?

Trend Micro, formerly known as MAPS, is an email filtering service that protects against spam and inappropriate content. The Trend Micro blacklist has registered more than 5,000 domains for use as spam traps. Trend Micro also receives data for its blacklist and filtering service from spam traps run by consumer Internet service providers, including Comcast. 

Key details

  • Type of list: This is a public blacklist.
  • Listings occur: At both the IP and domain level.
  • Criteria for getting listed: Sending spam to Trend Micro's spam traps.
  • Impact on deliverability: High.
  • Getting removed from this blacklist: Contact Trend Micro to request delisting using the following process:
  1. Confirm the listing is in the dynamic user list (DUL) before contacting Trend Micro.
  2. Correct the reverse Domain Name System (rDNS) entry.
  3. Email Trend Micro's DUL Team to remove your IP address or domain.

Common issues
The trap list includes listings ranging from fake domains to typo domains.

Some IP addresses are formatted like a fake domain that people enter into a web form, such as:

  • fakeaddressforyourlist.com
  • noneofyourbusiness.com
  • noneatall.com

Some are formatted to resemble typos that occur when entering an email address, such as:

  • netvigattor.com
  • lettterbox.com
  • ahoo.es

Some IP addresses look like they were generated automatically by software or were taken from people obfuscating their email addresses to avoid spam, such as:

  • notmenetvigator.com
  • nospamsprintnet.com

Some IP addresses are real domains that were used in the past as websites and email, then acquired by Trend Micro, such as:

  • networkembroidery.com
  • omeganetworking.com
  • sheratonforms.com

Others are inscrutable like 5b727e6575b89c827e8c9756076e9163.com, which is probably an MD5 message-digest algorithm hash. 

 

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