URGENT: Exchange blocking outgoing emails !

Posted on 2003-03-27
Medium Priority
Last Modified: 2006-11-17
This is a bit of a long winded question but i'll simplify it as much as possibe.

The problem is that all of a sudden our webserver has stopped sending (CDO generated) outgoing emails and if you look at the queue it says that "Unable to Bind to the DNS server".
See this image:
This happens for ALL of the outgoing items in the queue.

More information:
Our webserver was prevously used as a POP3 accessed exchange server.  Since then we have left exchange server on the machine as it seems to give greater control over SMTP.  
We have SMTP locked down so that only the machine ITSELF can use it (as we had issues with an open relay before).  
This configuration has worked for over a year now.  
No configurations have been changed recently.  
DNS stuff is working on that machine... (if i open internet explorer and type a site name it will resolve that address)
No code has been changed for the ASP pages using CDO to send emails.
I have tried restarting exchange.
I have tried restarting SMTP service.
I have tried restarting IIS.
All of the above refresh the queue, but it still ends up at the same situation.

Please help ASAP.
Question by:coopa
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
LVL 24

Expert Comment

by:David Wilhoit
ID: 8217020
The only thing I can think of is that SMTP is broken. Did you re-apply a service pack for windows, or change the IIS config? check out these articles, if this doesn't work, post event log errors.



telnet to port 25 on your mail server, make sure that you see the Exchange specific commands listed when you do the EHLO command.


Author Comment

ID: 8217071
okay, cheers for posting so quickly.
First article, read and tried that.  Have placed that key in registry and resarted service.  I then removed it.  Nothing. Doesn't work.

Second article "Cannot Send Mail After Re-Installing the IIS SMTP Service"   I have not re-installed the SMTP service so prolly not relevant.

The additional command verbs for the Exchange 2000 SMTP service WERE present.

Anything else i can try?

Can i revert back to the IIS SMTP gateway ?

Thanks again.
LVL 24

Expert Comment

by:David Wilhoit
ID: 8217088
what do you mean, "revert"?

BTW, that article stated to reinstall exchange, did you? 279616

you'd also have to reapply the Exchange service pack.

Office 365 Training for IT Pros

Learn how to provision tenants, synchronize on-premise Active Directory, implement Single Sign-On, customize Office deployment, and protect your organization with eDiscovery and DLP policies.  Only from Platform Scholar.


Author Comment

ID: 8217126
> what do you mean, "revert"?
When you install IIS it comes with it's own SMTP gateway... it's simple but WORKS...  8o)  
Exchange replaces this with it's own "enhanced" version.

> BTW, that article stated to reinstall exchange, did you?
No... Looking for a quicker fix... but to be honest exchange isn't being used on that system anyway... so UNinstalling it might be a better idea.  I just want to know what SMTP gateway that will leave me with.

Will attempt a system restart after lunch.

I admit, I am looking for a quick fix, but this system hosts over 20 sites almost all of which have inpage email facilities... so I'm looking to move the SMTP off and on to a linux box, which i can get working in no time, but that still leaves all of the thousands of emails that are waiting to go out from the existing SMTP.

LVL 24

Expert Comment

by:David Wilhoit
ID: 8217209
It didn't say to uninstall, just reinstall. the truth is, something DID change, or else it would still be working. this looks like it's the SMTP or a metabase problem, IIS. Reinstalling and applying the SP could work. Is there a firewall in front of you that changed? Is there a front-end server? something? I did some further digging, and this really is a problem with SMTP and the IIS, so unless you want to try reinstalling, you'll need to wait on someone else....or if it's company critical, call the MS support team, see if they can clear it up.

gotta run out the door, time to go to work, I'll check back in later.


Author Comment

ID: 8217437

We changed ISPs about 8 months ago/

The SMTP server was still looking at our old ISP DNS servers... I assumed it would use the ones specified in the network settings... but no...

Found it in an ADVANCED settings menu.

Thanks for your help Kidego.
LVL 24

Expert Comment

by:David Wilhoit
ID: 8218872
It was all you, congrats!

LVL 20

Expert Comment

ID: 10896584
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I will leave the following recommendation for this question in the Cleanup topic area:
   PAQ/ Refund

Any objections should be posted here in the next 4 days. After that time, the question will be closed.

EE Cleanup Volunteer

Accepted Solution

ee_ai_construct earned 0 total points
ID: 10935913
PAQed, with points refunded (300)

ee_ai_construct - (re-order part number #xm34)
Community Support Moderator

Featured Post

 [eBook] Windows Nano Server

Download this FREE eBook and learn all you need to get started with Windows Nano Server, including deployment options, remote management
and troubleshooting tips and tricks

Question has a verified solution.

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

This article explains how to install and use the NTBackup utility that comes with Windows Server.
New style of hardware planning for Microsoft Exchange server.
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…
This video discusses moving either the default database or any database to a new volume.
Suggested Courses

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