Solved

External mail routing issue

Posted on 2014-02-24
12
306 Views
Last Modified: 2014-02-26
Hi,

 I have installed Ex2013 on a separate box.  Over the weekend I have switched the 2010 CAS role to my new CAS server.  I update the external url's on the virtual directories on the new CAS server swapped out the ip's of my 2010 exchange putting it on the new one (as I don't have to make any changes to my public dns records) and set a new ip for my 2010 cas box with mailboxes.  Last, I updated the internet connector to include my new CAS server as a source server.  Basiscally, everything works fine except the now we can't send any external emails.  We got an undeliverable message saying that "client host x.x.x.x blocked using block list 1, mail from IP banned............
0
Comment
Question by:Laxjoey1
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 6
12 Comments
 
LVL 11

Expert Comment

by:Gregory Miller
ID: 39884318
Is the IP address that is provided in the bounce message your public IP or one of your private IP's?
0
 

Author Comment

by:Laxjoey1
ID: 39884348
The bounce message IP is our Public IP
0
 
LVL 11

Expert Comment

by:Gregory Miller
ID: 39884368
Does the IP in the message match you MX and PTR records in DNS? If so, this sounds like you are blacklisted someplace. If not, your mailserver may be getting viewed as not an authorized mail server and being rejected by the recipient server.

send a test message to EE-TEST@agbsm.net and I will post back the results from my mail server.
0
Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

 
LVL 11

Accepted Solution

by:
Gregory Miller earned 500 total points
ID: 39884381
Feb 24 18:07:54 svr005 postfix/smtpd[16800]: warning: 4.30.210.34: address not listed for hostname mail.nhsocal.com
Feb 24 18:07:54 svr005 postfix/smtpd[16800]: connect from unknown[4.30.210.34]
Feb 24 18:07:54 svr005 postfix/smtpd[16800]: NOQUEUE: reject: RCPT from unknown[4.30.210.34]: 550 5.1.1 <EE-TEST@agbsm.net>: Recipient address rejected: User unknown in virtual alias table; from=<JNg@NHSoCal.com> to=<EE-TEST@agbsm.net> proto=ESMTP helo=<anvmail1.nhsocal.com>
Feb 24 18:07:54 svr005 postfix/smtpd[16800]: disconnect from unknown[4.30.210.34]

Open in new window


Is the IP address listed here correct? Seems like it is not... I show a 208.x.y.z address from a DNS query...
0
 

Author Comment

by:Laxjoey1
ID: 39884416
4.30.x.x is our public ip and the 208.x.x.x are our ptr's
0
 
LVL 11

Expert Comment

by:Gregory Miller
ID: 39884451
The hostname being resolved does not match the hostname on the mail server. Resolution name is "mail.nhsocal.com" and the server is claiming to be "anvmail1.nhsocal.com"
0
 

Author Comment

by:Laxjoey1
ID: 39884469
but both names are included in our certificate registration
0
 
LVL 11

Expert Comment

by:Gregory Miller
ID: 39884496
Has nothing to do with the certificate but the name the SMTP service is giving when it issues the HELO or EHLO command.
0
 

Author Comment

by:Laxjoey1
ID: 39884561
I just got updated information from the admin that we only get blocked if we are sending mail to Office 365 users externally , all  other external domains seems to be fine.   We have requested to be unblocked from the block list and we will see what happens after 24 hrs.   Shall I close this case and reopen tomorrow if needed or leave it open?
0
 
LVL 11

Expert Comment

by:Gregory Miller
ID: 39885488
Leave it open... I am curious what the outcome is. I sell o365 and support it as well and always looking for good intel.
0
 

Author Comment

by:Laxjoey1
ID: 39886599
Good afternoon, we still getting messages blocked trying to send to office 365 users .  Seems like we don't have any other issues besides that.  The message reads:

CO9EHSMHS015.bigfish.com gave this error:
 Service unavailable; Client host [4.30.210.34] blocked using Blocklist 1, mail from IP banned; To request removal from this list please forward this message to delist@messaging.microsoft.com and include your ip address 4.30.210.34 .

:(
0
 

Author Comment

by:Laxjoey1
ID: 39887525
Hello EchgGURU,

 Got a question, on the digital certificate on the exchange box, the smtp service is not enabled for the digital certificate on the CAS server it only lists POP3, IMAP4 and IIS as services enabled.  Is that the proper configuration.  Please see attached
0

Featured Post

MS Dynamics Made Instantly Simpler

Make Your Microsoft Dynamics Investment Count  & Drastically Decrease Training Time by Providing Intuitive Step-By-Step WalkThru Tutorials.

Question has a verified solution.

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

I didn’t use eM Client for long when I decided to swap to Outlook 2016. The reason for the switch is that it started asking for payment to continue some of its services after one month.   The problems I faced when I didn’t pay were:   I was not …
Unified and professional email signatures help maintain a consistent company brand image to the outside world. This article shows how to create an email signature in Exchange Server 2010 using a transport rule and how to overcome native limitations …
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
In this Experts Exchange video Micro Tutorial, I'm going to show how small business owners who use Google Apps can save money by setting up what is called a catch-all email address in their Gmail accounts. By using the catch-all feature, small busin…

627 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