NDRs for non-existing users causing blacklisting
Question asked by Tina Cline - 1/23/2018 at 9:15 AM
I have to admit I am a spool watcher.  I routinely take a look throughout the day as it gives me a quick glance at possible issues such as email domains not accepting email or not functioning, possible spam compromises, blacklisting, etc.  
Usually there are about 100+ emails in the spool trying their 10 times to send - they are usually all System Admins sending NDRs to spammers since the User Does Not Exist in a certain domain.  Some of these incoming spams do have a weight well above the deliverable threshold, but because the user does not exist , SM cannot verify if it should be rejected or not and just send the user non-existent NDR.  
Is there a way to tell the to not send Smartermail NDRs for emails of a certain weight?  
This is snagging us as some of these NDRs are going to known spam-traps and blacklisting us.
SmarterMail 15
Example; here is what our current spool has 213 of:
Return-Path: <>
Message-ID: <636015146784037195@mySmartermail.Server.com>
From: "System Administrator"
To: Spammer@Spammer.com
Date: Tue, 14 Jun 2016 15:24:38 -0400
Subject: Delivery Failure
X-SmarterMail-MessageType: Bounce

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Tina Cline Replied
BUMP - this is still occurring where NDRs for "No Such User" are getting caught in spamtraps and resulting BACKSCATTERER blacklisting.  Can we turn off No Such User NDRs only?

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