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

Some inbound emails not coming to our SBS 2003 Exchange Server.

Posted on 2007-04-03
6
611 Views
Last Modified: 2009-07-29
What can I check on the SBS 2003 Exchange Server to try and find out why some inbound emails are not coming through?  We have a SPAM filter but they are not showing up there either.
Any help will be appreciated.
0
Comment
Question by:jmattson30
6 Comments
 
LVL 1

Expert Comment

by:alembic5
ID: 18845622
Are they emails from external sources? Are the originators of these emails getting a NDR (non delivery report) back after the attempt?
0
 
LVL 104

Accepted Solution

by:
Sembee earned 500 total points
ID: 18845664
As the recipient troubleshooting is almost impossible, particularly as it is just some email coming in.

Until the message actually hits your server you know nothing about it. There are lots of places between the sender and you where the message can be dropped.

The sender needs to show what server the message was delivered to and whether they got any NDR or not.

You could also put your domain in to dnsreport.com and see if you get any errors, but I doubt if this is a DNS problem.

Simon.
0
 
LVL 9

Expert Comment

by:MCPJoe
ID: 18846270
Check your network config meaning your router/firewall.  Perhaps it needs a reboot or perhaps your server IP changed for some reason and you need to update your port forwarder.  It could also be that your DNS MX records are not setup correctly.
0
Is Your AD Toolbox Looking More Like a Toybox?

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 33

Expert Comment

by:NJComputerNetworks
ID: 18846289
Your exhcnage server could be blacklisted... check www.dnsstuff.com  to see if you are on a list.
0
 
LVL 104

Expert Comment

by:Sembee
ID: 18847335
Black list would have nothing to do with inbound email - that would only affect outbound email unless the original poster is using blacklists.

Simon.
0
 

Expert Comment

by:ollietait
ID: 18850494
I saw an issue with an external spam filtering service - the external filtering service was added to the MX record, they then relayed it to the recipient. The recipient firewall was blocking this as a spoofed attack and the messages were queuing up on the spamfilter servers- check your firewall logs for attacks (this was a sonicwall FW). Oddly most messages came through, but some got blocked as attacks. Reconfigure the firewall to allow the blocked attacks from the IP adddresses of the spam-filter servers.
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

Utilizing an array to gracefully append to a list of EmailAddresses
Following basic email etiquette rules will help you write a professional email and achieve a good, lasting impression with your contacts.
In this video we show how to create an Address List 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 Organization >> Ad…
how to add IIS SMTP to handle application/Scanner relays into office 365.

839 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