Solved

Why would AOL block all emails from my company?

Posted on 2011-03-17
14
923 Views
Last Modified: 2012-06-27
AOL started blocking all emails sent to any of their members from our companys mail server.  We have Small Business Server 2003 with Exchange Server 2003.
0
Comment
Question by:captjcret
  • 4
  • 4
  • 2
  • +2
14 Comments
 
LVL 3

Expert Comment

by:dtrance
ID: 35159094
Could be for a variety of reasons, or even a mistake if the IP of your mail server falls within a block of addresses they black listed.  They may think you are spamming.  Are you having this trouble with anyone else?  This questions is like going to a mechanic and asking him why your car won't start.

I can only speculate.  You need to get a hold of AOL support to find out why for sure.
0
 
LVL 16

Assisted Solution

by:Enphyniti
Enphyniti earned 125 total points
ID: 35159157
Usually this is because your IP falls into a blocked range as dtrance stated, or because you do not have an rDNS entry for your IP, or your mailserver identifies itself (FQDN setting) as something other than what your rDNS address says.

If you do a ping -a xxx.xxx.xxx.xxx on your public IP, it will say:

Pinging <YOUR RDNS HERE>

that is what you should set your FQDN to in Exchange.
0
 
LVL 77

Expert Comment

by:Rob Williams
ID: 35159166
Agreed, AOL, ATT, Hotmail and a few others can block sites due to not reverse DNS record or using dynamic IP's, or a block of IP's for some reason black listed.
The simple solution with SBS 2003 isusually to run the Connect to the Internet wizard and change from sending mail using DNS to using a "smarthost" by inserting the SMTP server of your ISP. This way the recipient sees the mail coming from your ISP, who islikelyy sure to stay off of any black lists, has a static IP and reverse DNS record.
0
ScreenConnect 6.0 Free Trial

Explore all the enhancements in one game-changing release, ScreenConnect 6.0, based on partner feedback. New features include a redesigned UI, app configurations and chat acknowledgement to improve customer engagement!

 
LVL 16

Expert Comment

by:Enphyniti
ID: 35159209
Do you get any delivery failure notices returned?  If so, can you post them here?

Thanks!
0
 
LVL 76

Assisted Solution

by:Alan Hardisty
Alan Hardisty earned 250 total points
ID: 35159222
My article will give you a few things to check in addition to Reverse DNS which has been mentioned.

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/A_2427-Problems-sending-mail-to-one-or-more-external-domains.html

The main problem with SBS is the FQDN on your SMTP Virtual Server is usually configured as an invalid FQDN e.g., server.local and should be mail.domain.com or similar and needs to resolve to the IP address you are sending from.  To check / change, look at the properties of your SMTP Virtual Server and on the Delivery Tab> Advanced Button you will see the FQDN.  This is the name of your server that you tell servers that you connect to and this might well be the problem.
0
 
LVL 3

Expert Comment

by:dtrance
ID: 35159262
OP singled out AOL so I presume there are no other issues, hence I didn't bring up the pointer/MX record possibility.  That's why I asked if OP was having issues with any one else.
0
 

Author Comment

by:captjcret
ID: 35160810
This is the message that is on the returned mail.  This happens to anybody in the firm and they are all AOL users we are trying to send to.

From:   System Administrator  
Sent:   Thursday, March 17, 2011 11:14 AM
To:     Rebecca Ward
Subject:        Undeliverable: E-mail

Your message did not reach some or all of the intended recipients.

      Subject:  E-mail
      Sent:     3/15/2011 11:00 AM

The following recipient(s) could not be reached:

      melsway16@aol.com on 3/17/2011 11:14 AM
            Could not deliver the message in the time limit specified.  Please retry or contact your administrator.
            <mydomain.com #4.4.7>
0
 

Author Comment

by:captjcret
ID: 35160824
I chnaged the FQDN on the SMTP connector from domain.com to mail.domain.com.
0
 
LVL 77

Assisted Solution

by:Rob Williams
Rob Williams earned 125 total points
ID: 35160864
Do you have a reverse DNS record set up with your ISP? AOL does require a revers DNS (PTR) record to accept mail.
Do you have a static or dynamic public IP/
Have you tried using a smart host? You caeasilyly change back if you wish at any time.
0
 
LVL 76

Assisted Solution

by:Alan Hardisty
Alan Hardisty earned 250 total points
ID: 35160871
You should be good now - domain.com resolved to one IP Address for you and mail.domain.com resolves to another IP - the correct IP, so AOL should like you now - but you will probably have to request de-listing via their website:

http://postmaster.aol.com/SupportRequest.php
0
 

Accepted Solution

by:
captjcret earned 0 total points
ID: 35160928
It looks like the RDNS is not set correctly.  I am having the ISP make the change and we should be good to go.  Thanks
0
 
LVL 76

Expert Comment

by:Alan Hardisty
ID: 35160934
It is when I checked a few moments ago.
0
 
LVL 76

Expert Comment

by:Alan Hardisty
ID: 35160952
Are you sending from the 201.xxx.xxx.118 address?
0
 

Author Closing Comment

by:captjcret
ID: 35187469
Thanks
0

Featured Post

NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

Question has a verified solution.

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

Written by Glen Knight (demazter) as part of a series of how-to articles. Introduction One of the biggest consumers of disk space with Small Business Server 2008(SBS) is Windows Server Update Services, more affectionately known as WSUS. For t…
This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Small Business Server 2011. NOTE: This guide has been written using the preview version of SBS2011 therefore some of the screens may …
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
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 …

770 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