Check Blackhole List
A Realitime Blackhole List (RBL) - also known as a DNS Blackhole List (DNSBL), blacklist or blockist is a list of IP Addresses associated with SPAM. There are many RBLs in existence and the criteria used to add an IP address to the list will vary somewhat between operators. Most will list addresses of mail servers known to have sent SPAM, or mail servers that have sent SPAM to a honeypot system or ISPs who host spammers.
Successful Spammers are very familiar with these lists so they have adopted a number of techniques to use or hijack legitimate mail servers to send SPAM. This will land many otherwise law-abiding mail servers on a blackhole list.
Enter the name of your mail server (i.e. mail.mailserver.com) or the IP Address of your mail server and we'll check the most popular RBL servers and let you know if your server is listed. We will provide links you can use to get off the list when appropriate.
Please be patient - this could take 1 or 2 minutes to complete!!
