Hi there people. I'm facing a big flow of spam coming to our server. The problem is that the spammers are using From addresses which domains are senderscore certified, thus not being blocked by the filters.
Sender verification is ON. Sender verification callout is OFF because it has blocked newsletters and registration mails from different services.
The problem is that spammers are sending mails thru certified servers and using actually existing accounts in the "From" field, and their spam is arriving to several different domains with a Spam score of -1.0 or lower!
The only way to block this I can figure out would be an option to add keywords to SpamAssassin or Exim that will work as Stop Words that trigger a filter. I obviously am able to setup mail filters in a per domain basis from each cPanel, but I need to setup this filter in about 78 domains. That's why I need a global filter of keywords.
My stop words by now are:
- "v a c a n c y - w u g . c o m"
- "ganar dinero de una manera simple"
and must be computed in a OR basis, looking at the body content.
Does anybody know if this kind of filtering is possible and how to do it?