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So I have been trying to determine why spam emails that get through to our users inbox. Currently we are running SmarterMail Enterprise Edition Version 15.5.6284. Checking through my Delivery logs this morning I see that one of the obvious spam emails is getting through with a low enough score to deem it as Low Level Spam when clearly it should have been scored much higher.
So I did a lookup on MXToolBox for the server it is sent from mail.masteringtheskins.com and it's labelled on several RBL's, one of them being Spamhaus ZEN. So looking through the Delivery Log on this particular example I see this entry: [SPAMHAUS - ZEN: passed]
So just some insight here, our setup for SmarterMail does not use public DNS like Google, etc., we have our DNS servers at the office with public IP's and have SmarterMail configured to use them. I know from past posts on RBL lookup issues that too many lookups from a publicIP may be blocked at some point due to too may requests.So why is it that email is listed as passed in SmarterMail when clearly it should not have been? Anyone else run into this? Is there a log in SM that I can look at to determine whether or not RBL lookups are either rejected or failing? I didn't see anything obvious on this. I have all of our logs set to Detail.