Update to Real Time Blacklists

To better fight spam, JNH Solutions has implemented more real time blacklists. The blacklists that are checked before mail is delivered are:

• zen.spamhaus.org
• b.barracudacentral.org
• psbl.surriel.com
• bl.spamcop.net
• cbl.abuseat.org
• dnsbl.sorbs.net
• combined.rbl.msrbl.net
• spam.spamrats.com

To prevent any false positives, three of these RBL’s must be hit to reject the email.

We also use a Bayesian filter that will reject mail with high spam probability scores.

If you are a JNH Solutions client and are having trouble receiving email from someone that has managed to get themselves on a blacklist, please contact us and we can allow them a temporary inclusion until their mail server is removed from all blacklists.

So how do you know if your email server is on a blacklist? Check out MX Toolbox to see if your mail is being blocked.