Disable Bounces from Mail Forwarders
Question asked by Jason Cross - 4/18/2017 at 9:29 AM
I have a client who has about half of their accounts migrated to an internal mail platform on a different domain name.  To maintain continuity, they have accounts for all of these on my Smartermail server on their public domain but set to forward mail to their other domain.
So for example, user@publicdomain.com forwards email to user1@anotherdomain.com.
The issue I've been running into is that some of their accounts on my system have been receiving a fair volume of spam, which is then forwarded to their other email address, and that server is rejecting the message due to being potential spam, so it sends a bounce back to my server, which then tries to forward the bounce to the spammer/sender.  And because those accounts are often not real, this causes mail to build up in my spool as it goes through the retry process.
Is there any way to disable forwarding bounces via forwarder accounts?        

6 Replies

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echoDreamz Replied
YES!!! We are having this exact same issue.
Tim Uzzanti Replied
Employee Post
Were going to take a look at it over the next week or two. Just finalizing our SM 16.x release. We will update the community.
Tim Uzzanti
SmarterTools Inc.
(877) 357-6278
Larry Duran Replied
Employee Post
Hey all, the way to do this in SmarterMail today would be to have the forwarding server perform the spam checks and then it could prevent any forwarded spam. If you login as a system admin in SmarterMail, edit a domain, and click on the Technical tab, you'll see a drop down menu for 'forwarding exclusions'. This will give you control over mail tagged as spam low, medium, or high and whether or not it should be forward off to another server.
Larry Duran
Software Developer
SmarterTools Inc.
(877) 357-6278
echoDreamz Replied
Yep... Already set.
echoDreamz Replied
Could not deliver message to the following recipient(s):

Failed Recipient: REMOVED
Reason: The recipient does not exist

-- The header and top 20 lines of the message follows --

Received: from barkaot3.com (customer.rectified.net []) by REMOVED with SMTP;
Sun, 30 Apr 2017 12:09:07 -0600
From: " Kenneth Peterson" <glial@barkaot3.com>
Date: Sun, 30 Apr 2017 12:51:28 -0500
MIME-Version: 1.0
Subject: Shocking Video! The Cause Of Memory Loss
Message-ID: <egVrZ5MLgjqKdr9vaqp3Vx9W1fLOSrQY2Ug_9Bw9nA8.aJnCB9yxu6r2l5PkIxAzsS2dOb8DdjLfNmlvDF_DqGA@barkaot3.com>
Content-Type: multipart/alternative;
X-MessageSniffer-Identifier: C:\SmarterMail\Spool\proc\work\60590876.eml
X-GBUdb-Analysis: 0,, Ugly c=0.50549 p=1 Source Truncate
X-MessageSniffer-Scan-Result: 20
X-RBL-Warning: WEIGHT10: Weight of 180 reaches or exceeds the limit of 10.
X-RBL-Warning: WEIGHT14: Weight of 180 reaches or exceeds the limit of 14.
X-RBL-Warning: WEIGHT20: Weight of 180 reaches or exceeds the limit of 20.
X-RBL-Warning: WEIGHT30: Weight of 180 reaches or exceeds the limit of 30.
X-Declude-Sender: glial@barkaot3.com []
X-Declude-Spoolname: 60590876.eml
X-Declude-Note: Scanned by Declude 4.12.11
X-Declude-Scan: Incoming Score [180] at 12:09:13 on 30 Apr 2017
X-Declude-Tests: ZEN [30], REVDNS [30], RETURNPATH [30], SPF-FAIL [30], SNIFFER-GENERIC [30], SNIFFER-TRUNCATE [30], WEIGHT10 [10], WEIGHT14 [14], WEIGHT20 [20], WEIGHT30 [30]
X-Country-Chain: UNITED STATES->destination
X-Declude-Code: e
X-Declude-Recipcount: 1
X-HELO: barkaot3.com
X-Identity: | customer.rectified.net | barkaot3.com

Email was in our outbound gateway. I am assuming SmarterMail should have gave a 550 response code at the SMTP layer not went into the delivery layer and wasted resources scanning a email for a recipient that does not exist.
echoDreamz Replied
There is 27 of the above emails in 1 of our gateways, all going to bogus users like 23oi5472398123hjkiu7k@domain.com, obviously bad accounts.

I did notice that "Enable Remote Bounces" is a new setting to SM v15 and I am wondering if this has something to do with it.

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