Solved

Connection was dropped by remote host

Posted on 2010-08-17
7
343 Views
Last Modified: 2013-11-30
We have a business partner that uses google apps.  Recently we changed the IP address of our email server and now they get an error "Connection was dropped by remote host" when they try to send us email.  They are the only ones that are getting this error.  Could it be something on our end causing this? How can I determine which end the error is at?
0
Comment
Question by:Pancomp60
[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
  • 2
  • 2
  • 2
  • +1
7 Comments
 
LVL 2

Accepted Solution

by:
TravisT earned 250 total points
ID: 33458366
You need to check your DNS settings to make sure they have propagated correctly after changing your IP address.

Once that is done, you and they, need to run a DIG or NSLOOKUP from each location to make sure the same data is returned for the MX record and IP.  It may just be that their machine has cached the IP address of the previous MX record and it will stay that way until either (a) the requirements are met for the old/new DNS record you have set (timeouts, etc..) or until they force a fresh new DNS lookup of the MX record.

Travis
0
 
LVL 5

Expert Comment

by:buildingkick
ID: 33458390
I need a little more info about the end users environment - a quick and dirty guess is that they may not have the updated DNS records (with the new IP address) in their system which may cause it to not resolve properly until the records are updated.  Again, depending on the environment, a simple flush of the DNS or reboot could solve this problem if they are the only ones having an issue.
0
 
LVL 9

Expert Comment

by:Barry Gill
ID: 33459573
conection dropped by host tells me that the server they are trying to send to does not accept port 25 connections. is the old IP yours or has it had it's smtp listener disabled?

if you are receiving from everywhere else, ask them to raise a trouble ticket with their provider as this fault is on their side entirely.

Have you checked your firewall rules where a block googl IP's rule may have kicked in? (sometimes these things get created on one server and you move from one to another and forget about that old rule - though I would not think this is likely, but worth checkin out)
0
Has Powershell sent you back into the Stone Age?

If managing Active Directory using Windows Powershell® is making you feel like you stepped back in time, you are not alone.  For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why.

 

Author Comment

by:Pancomp60
ID: 33465855
buildingkick: wrote:
I need a little more info about the end users environment

They are using Google Apps as their email system, so they do not have any control over their MX records; it is entirely hosted by google. I will ask them to check the dns record on a local machine to see what they have for our domain.
0
 
LVL 2

Expert Comment

by:TravisT
ID: 33478261
Not their MX records, yours. Their MX records only affects their incoming mail.  By guess is by now, any DNS issue, has been cleared up since the new zone data probably propagated by now.
0
 
LVL 9

Expert Comment

by:Barry Gill
ID: 33480879
exactly. so the big question is WHERE are they trying to send mail.
Have you checked your firewall yet?
0
 

Author Comment

by:Pancomp60
ID: 33511931
I am working with our provider to have them confirm that our DNS records and our MX records are accurate, and that the individual's address is not being blocked by the firewall.
0

Featured Post

Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.

Question has a verified solution.

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

Find out what you should include to make the best professional email signature for your organization.
This article explains how to install and use the NTBackup utility that comes with Windows Server.
In this video we show how to create an email address policy in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Mail Flow…
The video tutorial explains the basics of the Exchange server Database Availability groups. The components of this video include: 1. Automatic Failover 2. Failover Clustering 3. Active Manager

738 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