We are successfully trapping all of the new domains listed via our antispam settings.
We have ZERO false positives. When a new spammer comes along, we might see a couple of spam messages from them, but the several databases we run are quickly updated.
NOTE: These settings only work if you have all of them properly set - exactly as outlined in the document, IE:
- point to your own DNS servers - NOT Google or other busy public servers.
- do not allow users to override any of the antispam settings, and
- have greylisting setup - not allowing users to disable the greylisting settings.
In every case where I have been asked to troubleshoot, there were external antispam tools setup, which modified the SmarterMail spam settings scores, the greylisting had not been enabled, or the users were allowed to modify their own antispam settings - overriding the master antispam settings.
Allowing users to have input in spam settings is only asking for support headaches.
Phonr: (773) 491-9019
Phone: (224) 444-0169
E-Mail and DNS Security Specialist
Network Security Specialist
Customer Service Portal: https://portal.chicagonettech.com
Security Blog: http://networkbastion.blogspot.com/
Web and E-Mail Hosting, E-Mail Security and Consulting