Sporadic Emails disappearing. Exchange 2003

Posted on 2007-10-02
Last Modified: 2013-11-30
Exchange 2003
Windows Server 03

Heres an odd one, I think its a sporadic DNS issue but maybe not. They are complaning that people are sending them messages and they never receive them.

I email a client, they never recieve the message. I email them again and they receive it.

I check their Exchange logs and sure enough the 1st message is nowhere to be found.

I check out my logs and it looks like it went through, however, its missing the server domain name. You can see it on the last line of the logs. Check it out.

heres the one that did not go through

and here is the one that did

Any ideas what could cause that problem?
Question by:Biziteks
    LVL 104

    Expert Comment

    Message tracking only shows what the server that is receiving the message has in its banner. Therefore if the banner is blank or something like "220              " then message tracking will not show anything.
    You can see that in the second screenshot because it has a .local address - which isn't valid on the internet.

    If I had seen that message tracking log then I would say the message has been delivered correctly, it is the other side that has the problem.
    You can look at their MX records using the online tools and see if they have additional servers in the MX records. That may show that they have an invalid server, or a server at an ISP which is losing the email.


    Author Comment

    FAIL Missing (stealth) nameservers FAIL: You have one or more missing (stealth) nameservers. The following nameserver(s) are listed (at your nameservers) as nameservers for your domain, but are not listed at the parent nameservers (therefore, they may or may not get used, depending on whether your DNS servers return them in the authority section for other requests, per RFC2181 5.4.1). You need to make sure that these stealth nameservers are working; if they are not responding, you may have serious problems! The DNSreport will not query these servers, so you need to be very careful that they are working properly.
    This is listed as an ERROR because there are some cases where nasty problems can occur (if the TTLs vary from the NS records at the root servers and the NS records point to your own domain, for example).  

    FAIL Missing nameservers 2 ERROR: One or more of the nameservers listed at the parent servers are not listed as NS records at your nameservers. The problem NS records are:

    Author Comment

    These are the two errors I get back from DNSReport, nothing life changing there. Problem is still continuing today. I checked out there MX records and they all come out fine as well.

    Domain Type Class TTL Answer NS IN 3600 MX IN 3600 [Preference = 10] NS IN 3600 SOA IN 3600 Primary DNS server:
    Responsible Name:
    Serial: 2003021702
    Refresh: 80000 (22h 13m 20s)
    Retry: 3600 (1h)
    Expire: 604800 (1w)
    Minimum/NegTTL: 86400 (1d)
 A IN 3600 A IN 3600 A IN 3600 A IN 3600
    LVL 104

    Expert Comment

    Name server errors are out of your hands.
    When it comes to email you are only interested in the mail server section of - nothing more.

    Can you telnet to the site that has the problems on port 25?
    If you can, do you see a banner, or does the cursor just sit there?


    Author Comment

    Hmmm I telnetting to it once, it just sat there with a blinkin cursor for about 30 seconds.

    Then I tried it again immedialty after and it prompted me with the 220 SMTP message.

    220 hms-server.HMS.local Microsoft ESMTP MAIL Service, Version: 6.0.3790.211 re
    dy at  Thu, 4 Oct 2007 08:50:59 -0400
    LVL 104

    Accepted Solution

    That could be tarpitting or something like that. It isn't the Exchange way of doing it, as Exchange responds immediately and the tarpit is later in the sequence. Therefore it could be a third party tool that is causing the problem.

    Either something is causing your connection to be disrupted initially and then allowed through or something is happening at the other end.

    Most odd.


    Author Comment

    I restarted the server and it seems to have rectified the problem. Weird

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Why spend so long doing email signature updates?

    Do you spend loads of your time carrying out email signature updates? Not very interesting are they? Don’t let signature updates get you down. Let Exclaimer Cloud - Signatures for Office 365 make managing email signatures a breeze.

    Find out how to use dynamic social media in email signatures with this top 10 DOs & DON’Ts.
    Not sure what the best email signature size is? Are you worried about email signature image size? Follow this best practice guide.
    In this video we show how to create a Resource Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: Navigate to the Recipients >> Resources tab.: "Recipients" is our default selection …
    The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…

    760 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

    Need Help in Real-Time?

    Connect with top rated Experts

    8 Experts available now in Live!

    Get 1:1 Help Now