The Blacklist Check

This test will check a mail server IP address against 147 DNS based email blacklists. (Commonly called Realtime blacklist, DNSBL or RBL). If your mail server has been blacklisted, some email you send may not be delivered. Email blacklists are a common way of reducing spam.

DNSbl Information

Check to see if your IP addresses are listed with over 100 DNS based anti-spam databases! Will your mail server be blocked by DNSbl filters. Probably the most common way of detecting spam is rejecting mail that comes from mail servers known (or believed) to send spam. This is done by taking the IP address of the remote mail server, converting it to a domain name using the ip4r format (a.b.c.d becomes d.c.b.a.lookupzone.com), and seeing if that name exists.

BlackList Alert

LHSBL/RHSBL Queries. Takes a long time to display page. Wait at least 5 mins.

GeoBytes Geo-location Service and Spam Origin Locator Tool

"An online tool to assist Internet users locate the geographical location of an IP Address. Just enter the IP address and the Geographic location is returned." IP Geolocation service Here or Spam Origin Locator Here

GFI Email Antivirus and Security Testing Zone

"Is your email system secure against email viruses and attacks? Find out now by doing a vulnerability check on your email system!"

Meet the people who send you SPAM

200 Known Spam Operations responsible for 80% of your spam.