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NoobNKCFlag for United States of America

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554 Your access to this mail system has been rejected due to the sending

We keep getting the following error when trying to send email to a couple clients.

554 Your access to this mail system has been rejected due to the sending
MTA's poor reputation:

We have 4 domain names that use seperate IP addresses, but use MailEnable as the mail "server".

I have checked Spamhaus and none of our IP's are being blocked
I have checked MXToolBox and none of our domains have been blacklisted
I also checked Reputation Authority and for each of our ips (4 total) it shows we are on the DNS block list. (i do not think this is the cause for the error). I have requested them to remove us from the list.

If I run the diagnostics on MXToolbox for our Mail server everything is OK

I have checked MX records for each domain name

The clients that we are trying to send emails to, say they have "white listed" our domain name and we are still getting the error.

We are using MailEnable not Exchange.

Help please.
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cgratton1977
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This should help you.

http://www.mailenable.com/kb/content/view.asp?ID=ME020517 

Let me know how you make out.
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Pay a visit to www.senderbase.org and see if the reputation of your IP Address is Poor, Neutral or Good.

Which is it?

Alan
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swertz

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I checked Senderbase.org and all 4 IP's show neutral.

however it shows ip of 66.148.13x.yyy as going to mail.company.com (our smtp mail server). That IP address doesnt belong to our mail server? hmm
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ASKER

We also get the following error sometimes:

-----Original Message-----
From: Mail Delivery System [mailto:Mailer-Daemon@localhost.localdomain]
Sent: Tuesday, October 16, 2012 1:14 PM
To: user@company.com
Subject: Mail delivery failed: returning message to sender

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  user@xxxx.k12.mt.us
    SMTP error from remote mail server after RCPT
TO:<nichole_emerson@gfps.k12.mt.us>:
    host mx1.xxxx.k12.mt.us [69.51.X.X]: 554 5.7.1
<unknown[66.148.X.X]>:
    Client host rejected: envelope policy RBL PTRNUL

------ This is a copy of the message, including all the headers. ------
------ The body of the message is 406334 characters long; only the first
------ 106496 or so are included here.


Im suspecting rDNS is not setup. How do I go about setting up rDNS.
Reverse DNS is configured by your ISP (unless they tell you they can't - as some seem to suggest).

Give them a call or send them and email and ask for Reverse DNS to be setup on your relevant fixed IP address.
Most ISP say they can't, but alanhardisty is correct, they can and will depending on how "angry" you get .

Angry is never the solution ..just the car:)
I would replace 'Most' with the word 'Some' in the above comment.
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ASKER

I contacted our ISP and they said rDNS is in place. I had them verify the IP with the A record and they match. So I believe they indeed have rDNS in place.

so now what. I have checked our reputation through http://www.reputationauthority.org/index.php

I have checked www.senderbase.org and its ok.

Everything I have checked seems to be OK. Im lost.
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swertz

You should be able to verify the rDNS yourself using a site like dnsstuff and/or mxtoolbox.  Have you tried that?
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ASKER

Yes. When I check the IP of our email on debouncer.com reverse DNS does point to the correct mail.company.com for each of our companys. So it looks like rDNS is in place. However we continue to receive:

554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.
Well surely there is a problem, but we're not looking in the right places...OR the administrator of the destination system has put a local block on your IP, but that's unlikely.

You said that senderbase indicates that your IP is "ok", but what exactly does it say?  The result should be Good, Neutral, or Poor.  Does it have a Y in the Fwd/Rev DNS Match column?  Does it indicate the correct hostname?  What is the Daily Magnitude?

I've never seen reputationauthority.org before, but I just tried a few IPs and found that it doesn't appear to be very comprehensive.  For example, it says my home address is not on any RBLs but it certainly is and should be.  Try your IP here:

http://mxtoolbox.com/blacklists.aspx
http://www.anti-abuse.org/multi-rbl-check
Also, I just noticed your original comment stating that the recipient has whitelisted you but you're still getting blocked.  Is it possible that you are relaying your mail through another system, such as your ISP's mail server, and that server's IP is blocked?  It sounds like the block may be applied to an IP other than the one you are investigating.

Examine the error message headers carefully to determine what IP it is reporting as blocked.
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ASKER

I checked Senderbase.org for all 4 of our IP addresses.
66.148.xxx.xx1 is Neutral with Magnitude of 0.0
66.148.xxx.xx2 is Neutral with Magnitude of 0.0
66.148.xxx.xx3 is Neutral with Magnitude of 0.0
66.148.xxx.xx4 is Neutral with Magnitude of 0.0

Heres the header from the message the gets kicked back.

Received: from secureEmail.ventureusenterprises.com ([192.168.1.1]) by companyname.com with MailEnable ESMTP; Tue, 23 Oct 2012 11:34:01 -0500
Received: from exim by localhost.localdomain with local (Exim 4.71)
      id 1TQhQf-0002SH-DO
      for user@companyname.com; Tue, 23 Oct 2012 11:34:09 -0500
Date: Tue, 23 Oct 2012 11:34:09 -0500
Message-Id: <E1TQhQf-0002SH-DO@localhost.localdomain>
X-Failed-Recipients: esgalvan@progresoedu.net
Auto-Submitted: auto-replied
From: Mail Delivery System <Mailer-Daemon@localhost.localdomain>
To: user@companyname.com
Subject: Mail delivery failed: returning message to sender
Precedence: bulk
X-ME-Bayesian: 0.000000
Return-Path: <>
Content-Type: text/plain
X-Antivirus: AVG for E-mail 10.0.1427 [2441/5349]
X-AVG-ID: ID11F7560B-48E1E59A

Error:
    SMTP error from remote mail server after initial connection:
    host mailfilter.progresoedu.net [64.209.144.240]:
    554-ironport.progresoedu.net
    554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.
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