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
Solved

Failed to connect to SMTP host

Posted on 2011-03-16
7
770 Views
Last Modified: 2012-05-11
I have an exchange 2003 server which I know very little about. Nothing on my end has changed but occaasionally we receive a phone call from some of our vendors saying they tried to send an email and receive the following msg:

Failed to connect to SMTP host @@@@@.com becasue remote system no longer responding. This strange thing is that this does not happen for all messages. Can someone provide some guidance as to how I go about trouble shooting this (in simplest terms possible)?
0
Comment
Question by:tmaususer
  • 4
  • 2
7 Comments
 
LVL 7

Accepted Solution

by:
waleeda earned 200 total points
ID: 35147316
check the SMTP service is running on your exchange server
0
 

Author Comment

by:tmaususer
ID: 35147396
Yes. SMTP services are running. I also restrating just in case as well
0
 
LVL 7

Expert Comment

by:waleeda
ID: 35147445
can you telnet to your exchange server on port 25
0
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.

 
LVL 8

Expert Comment

by:GundogTrainer
ID: 35147476

If you open a command prompt on your PC can you telnet to your exchange server on port 25
Telnet Servernamehere 25

this should get a response from you e exchange like:
220 SERVERNAME.something.com Microsoft ESMTP MAIL Service
This would prove your SMTP service is actually listening.

The address @@@@@.com (I know its just obscured to protect your identity) but does that resolve you your own server,gateway or firewall ?
If that address is your firewall then I would expect it to forward the port to your exchange server.
You may be able to look at the logs on the firewall to see if it is passing traffic OK.
0
 

Author Comment

by:tmaususer
ID: 35147486
Yes
0
 

Author Comment

by:tmaususer
ID: 35147600
Strange. When I telnet from my pc my command window goes blank with a blinking cursor and does nothing. I have to press a key to return to a dos prompt. Telnet from the exchange server works with no issues.

Yes, it appears my asa is passing traffic correclty or at least from what I can see since I am not that well versed with the asa.
0
 

Author Closing Comment

by:tmaususer
ID: 35156663
I restarted smtp services even though it was running and that appeared to work. Strange.
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

Suggested Solutions

Find out what you should include to make the best professional email signature for your organization.
How to resolve IMCEAEX NDRs in Exchange or Exchange Online related to invalid X500 addresses.
In this video we show how to create a mailbox database 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 Servers >> Data…
To show how to create a transport rule 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 >> Rules tab.:  To cr…

792 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