Solved

Help needed sending emails to certain domains.  Maybe blacklisted?

Posted on 2016-10-27
4
39 Views
Last Modified: 2016-11-15
We had a problem where our server was compromised and got opened up as a relay.  This problem is now corrected but I have multiple issues in the aftermath of it.  

We have emails that go out and we the receiver get the email, it falls into their SPAM folder and it never did this before.  I'm referring to companies we had regularly emailed and still do.

We still have some domains that we can't email to.  It appears as if we are blacklisted.  See below.

Diagnostic information for administrators:
Generating server: VENUS.LOCAL.iob-gso.com
ourfriend@att.net
flpd599.prodigy.net #553 5.3.0 flpd599 DNSBL:RBL 521< 64.196.118.65 >_is_blocked.For information send an email to abuse_rbl@abuse-att.net ##
Original message headers:
Received: from VENUS.LOCAL.iob-gso.com ([2002:8101:129::8101:129]) by
 VENUS.LOCAL.iob-gso.com ([2002:8101:129::8101:129]) with mapi id
 14.03.0224.002; Thu, 27 Oct 2016 08:23:03 -0400
From: <me@iob-gso.com>
To: <ourfriend@att.net>
Subject: testing email
Thread-Topic: testing email
Thread-Index: AdIwTNeRRCDp2AW+SQS/8yyg2YSiwg==
Date: Thu, 27 Oct 2016 12:23:02 +0000
Message-ID: <0CBB5438ADF6E84A9BBA55FA82B6818029C7CD10@VENUS.LOCAL.iob-gso.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
x-originating-ip: [192.168.100.67]
x-exclaimer-md-config: 4b845ab1-925f-41d0-a654-2ab6c1ae37e6
Content-Type: multipart/related;
      boundary="_004_0CBB5438ADF6E84A9BBA55FA82B6818029C7CD10VENUSLOCALiobgs_";
      type="multipart/alternative"
MIME-Version: 1.0

I have requested to be unblocked several times but to no avail.  I am unsure of where to go with these problems.

Thanks so much!

Lanee
0
Comment
Question by:Lanee Kirby
  • 2
4 Comments
 
LVL 35

Accepted Solution

by:
Kimputer earned 167 total points (awarded by participants)
ID: 41862328
For these "problem" domains, you sadly have to find a trustworthy SMTP relay and forward to that relay. When you're finally removed from their blacklist, you can one by one turn off the relay (easiest way is to add the smtp relayer as the mx record for that domain on your own DNS server)
1
 
LVL 3

Assisted Solution

by:Spencer Scherer
Spencer Scherer earned 167 total points (awarded by participants)
ID: 41862552
Additionally, you can also set your Exchange server to only relay emails that are going to a particular domain so that you limit the amount of emails you send through the relay as many times they have price points and limits for each level.  Very easy to setup and also remove once you get removed from the blacklist.
0
 
LVL 26

Assisted Solution

by:Dr. Klahn
Dr. Klahn earned 166 total points (awarded by participants)
ID: 41863265
You're correct. AT&T has blacklisted you and given their unimpressive support it will probably stay that way for some time.  Unfortunately it's impossible to tell if it's this particular sending email address, or the IP address that the SMTP originator is on, or the IP block that the SMTP originator is in, or the domain name of the sending email address, or the domain name of the sending SMTP originator.  The issue could be any or all of the above.

I agree with Kimputer.  For some domains you'll have to send email through a trusted outgoing relay until the problem goes away.  If you sign up with a service such as SMTP2GO (which, full disclosure, I personally use), you can relay 5000 emails per month for $90 a year.  This is less than the cost of one hard drive and given that your emails are not going through, there should be no argument about the price.
0
 
LVL 26

Expert Comment

by:Dr. Klahn
ID: 41887617
EE requested stale question closure.  All answers supplied are correct and useful.
0

Featured Post

Are your AD admin tools letting you down?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This article explains in simple steps how to renew expiring Exchange Server Internal Transport Certificate.
This article explains how to install and use the NTBackup utility that comes with Windows Server.
how to add IIS SMTP to handle application/Scanner relays into office 365.
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question