Open ports for Exchange 2003

Posted on 2006-04-18
Last Modified: 2008-03-17

Which ports on the firewall have to be open in order for Exchange 2003 (part of SBS ) to work?

Question by:dboodoos
    LVL 7

    Accepted Solution

    It depends,  for example with or without Outlook Web Access.  

    Most ports are described in
    E-mail     25    Allows incoming and outgoing Simple Mail Transfer Protocol (SMTP) traffic so Exchange can send and receive Internet e-mail.

    But POP3 110 can be used and is not described.
    LVL 74

    Assisted Solution

    by:Jeffrey Kane - TechSoEasy
    Zadkin... I don't recommend using the POP3 service on an SBS (this would be for remote users to use POP3 to gather their mail from the Exchange server) because Outlook Web Access is available.  The POP3 Connector, if used, for retreiving mail from an ISP's server does not require port 110 to be open.

    However, in order for Outlook Web Access to function, port 443 must be open as well.

    LVL 7

    Expert Comment

    You are most probably right.  I used POP to allow remote access for mobiles with POP clients.  
    Nowadays I have a mobile with IMAP,  but I don't think it is worth the configuration effort.
    LVL 74

    Expert Comment

    by:Jeffrey Kane - TechSoEasy
    You shouldn't need either if its Windows Mobile... because Exchange is integrated with activesync.


    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Looking for New Ways to Advertise?

    Engage with tech pros in our community with native advertising, as a Vendor Expert, and more.

    In the event you manage a Small Business Server 2003, and you are audited for PCI compliance, there are several changes you must make in order to pass the audit. I can take no credit for discovering any of these fixes or workarounds, but there is no…
    Because virtualization becomes more and more common, and, with Microsoft Hyper-V included in Windows Server at no additional costs, and, most server hardware nowadays is more than capable of running a physical Small Business Server (SBS) 2008 or 201…
    In this sixth video of the Xpdf series, we discuss and demonstrate the PDFtoPNG utility, which converts a multi-page PDF file to separate color, grayscale, or monochrome PNG files, creating one PNG file for each page in the PDF. It does this via a c…
    Here's a very brief overview of the methods PRTG Network Monitor ( offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

    794 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

    16 Experts available now in Live!

    Get 1:1 Help Now