Exchange 2010 SMTP

Posted on 2011-10-04
Last Modified: 2012-05-12
Hi guys!

On a Windows Server 2011 SBS, I have a problem with Exchange. The SMTP is not working. Using a telnet test from the server itself on the lan ip it pops up the following error:

421 4.3.2 Service not available
Connection to host lost.
-it has the same behavior doing the test even from another machine
-the firewall is turned off

but using "localhost" instead of 192.168.x.x is working

Thank you!

Question by:r3helpdesk
    LVL 14

    Expert Comment

    I would check the configuration of the default receive connector as by default anonymous connections are not permitted. Place a tick in the anonymous box and you should then be able to connect. The reason why it works from the Exchange server is because "exchange servers" are enabled to rely by default.
    LVL 5

    Accepted Solution

    check on which ip addresses the smtp connector is configured to listen to, could be you have set it to only listen to which is localhost and not the internal ip ...

    it's in hub transport under server configuration in the exchange management console!

    Author Closing Comment

    Thank you

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Find Ransomware Secrets With All-Source Analysis

    Ransomware has become a major concern for organizations; its prevalence has grown due to past successes achieved by threat actors. While each ransomware variant is different, we’ve seen some common tactics and trends used among the authors of the malware.

    Email statistics and Mailbox database quotas You might have an interest in attaining information such as mailbox details, mailbox statistics and mailbox database details from Exchange server. At that point, knowing how to retrieve this information …
    Check out this infographic on what you need to make a good email signature that will work perfectly for your organization.
    In this video we show how to create a Shared Mailbox 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 Recipients >> Sha…
    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…

    737 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

    19 Experts available now in Live!

    Get 1:1 Help Now