Blocked?

If your ISP address has been blocked but you are not the administrator of the IP addresses in any of the Email Reputation Services lists, contact your ISP to resolve the problem. Trend Micro Email Reputation Services cannot resolve issues regarding any of the blocked lists with end-users or those who are not directly responsible for the particular network on the blocked lists. For more information, see Step 3: Send a Removal Request.

There are several reasons why an IP address may need to be removed from the blocked lists:

• Network reorganization: When an ISP (especially a smaller one with a one or more Class C networks) reorganizes its IP address pool, fixed servers and dial-ups change places.

• Network inheritance: You inherited an address pool that had previously been or are still being blocked.

• Listing error: Some dynamic IP addresses might have been added to the blocked lists incorrectly.

But why is your address being blocked? Here are some reasons why.

• If your IP address is in the DUL list and:

  • You use a standard mail client. Probably your mail program is set to use a mail server other than the one your current ISP provided you.

  • You use a mail (SMTP) server on your own computer, or you share your Internet connection with several other people on a local network with a proxy server. Probably your recipients cannot tell the difference between your legitimate mail delivery and a spammer's trespassing on their equipment.

• If your IP address is in the Known Spam Source List, your IP address may be getting blocked because the IP address:

  • May be a known spam source

  • May support a service that sends spam

  • May use multi-hop open relay

  • May be using a compromised host

• If your IP address is in the QIL list, there might be some unauthorized activities happening on your computer or server. This might mean that your computer has been hacked or compromised.