Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

Emails not sending with Exchange 2003 SBS

Posted on 2006-11-14
7
Medium Priority
?
208 Views
Last Modified: 2010-03-06
I have a weird problem here. I have Exchange running on an SBS 2003 box. For some reason it won't send mail. it just sits in the queue for ages. I can't work out why the mail won't go. if I right click and select force connection nothing happens. There appears to be no errors in the logs even when I set logging on the exchange transport to maximum. It just sits there doing not a great deal. I pretty confused to be honest. I'm sorry I can't give any detailed errors, but there don't appear to be any! Can anyone help?

Cheers

Tanjuakio
0
Comment
Question by:tanjuakio
  • 3
  • 2
5 Comments
 

Author Comment

by:tanjuakio
ID: 17941694
Quick update, I've changed the delivery method to use a smart host (mailhost.zen.co.uk) this seems to have speeded things up. I'm still confused as to why though. I have a few servers setup with different customers all using SBS 2003 and the same ISP.
0
 
LVL 5

Accepted Solution

by:
lollygagr earned 2000 total points
ID: 17942082
Do you have RDNS/PTR records set up for the external ip of your Exchange server?  Most email servers will try to look up the connecting ip in DNS, and if there are no corresponding records, they will treat your mail as spam and either block or defer delivery.  Here is a good overview article with instructions:  http://www.amset.info/exchange/dnsconfig.asp.

If DNS is set up as above, another possible issue is the DNS being used by your SBS servers.  What are they using for primary and secondary resolution, and are there forwarders set up?  I assume you can browse to the internet from these servers ...
0
 

Author Comment

by:tanjuakio
ID: 17942360
I don't know if an RDNS record is set for the sending IP. beings as the mx record would point to the customers email hoster and not the exchange server I'm guessing this wouldn't help? (Incoming email is handled by POP3). That would answer the question of why email started to flow when I set a smart host I guess.
0
 
LVL 5

Expert Comment

by:lollygagr
ID: 17982830
MX is the DNS record used for mail delivery, but a lot of sites have started looking for RDNS to try and cut down on the spam being delivered to them.  The reasoning is that zombied spambots and fly-by-nighters won't have RDNS set up ... it's a bit heavy-handed but fairly effective.  More and more sites have gone to using RDNS as one of their anti-spam tools, especially the big providers like AOL and Hotmail.   The fact that the mail started delivering when you switched to a smart host is a strong indicator that RDNS was the main issue.
0
 

Author Comment

by:tanjuakio
ID: 17986573
their email has been runnign ok for the past week or so (having said that I'll get a call now!) So I think it was due to RDNS. Not sure what to do with the points though.
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

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

How to effectively resolve the number one email related issue received by helpdesks.
Microsoft Jet database engine errors can crop up out of nowhere to disrupt the working of the Exchange server. Decoding why a particular error occurs goes a long way in determining the right solution for it.
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…
This video shows how to quickly and easily deploy an email signature for all users in Office 365 and prevent it from being added to replies and forwards. (the resulting signature is applied on the server level in Exchange Online) The email signat…
Suggested Courses

581 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