Endpoint Protection

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  • 1.  How do I prevent Endpoint Protection from blocking outbound emails to large groups of people?

    Posted Mar 11, 2010 04:00 PM
    Endpoint Protection v11 suddenly prevented outbound emails from Outlook 2007 being sent to a grouping (e.g. 20) of recipients.  How do I remove this hinderance?


  • 2.  RE: How do I prevent Endpoint Protection from blocking outbound emails to large groups of people?

    Posted Mar 11, 2010 04:09 PM
    using pop3?
    seems like outlook email autoprotect is blocking it..
    on one machine
    add/remove programs
    select endpoint
    click change
    click modify
    remove outlook
    are u able to send mail after that?
    do you have Network threat protection installed? 
    whats the version of SEPM you are using?


  • 3.  RE: How do I prevent Endpoint Protection from blocking outbound emails to large groups of people?

    Posted Mar 11, 2010 04:11 PM
    Are you sure Endpoint is doing it ?
    Disable Outlook email auto-protect to confirm if its endpoint which is blocking it.. 


  • 4.  RE: How do I prevent Endpoint Protection from blocking outbound emails to large groups of people?

    Posted Mar 11, 2010 04:13 PM
    if using other version and using pop3 it was a bug in earlier version

      Symantec Endpoint Protection Email Auto-Protect does not work properly when using Secure POP3 (POP3S) port 995
      Fix ID: 1509203
      Symptom: Symantec Endpoint Protection Email Auto-Protect does not work properly when using POP3S port 995. The Symantec Endpoint Protection email proxy modifies SSL v2 Client Hello, preventing POP3S SSL mail connections in some cases.
    Solution: Fixed the email proxy to not modify SSL v2 Client Hello. 


  • 5.  RE: How do I prevent Endpoint Protection from blocking outbound emails to large groups of people?

    Posted Mar 11, 2010 06:44 PM
    Yes, POP3.  You solution "worked" on my machine (at least, for now).  I had another person at the company try and it and it didn't work when she tried her email to 20 or so recipients (all of her regular one/few recipient emails work and have always worked.  The error message she sees is a "Symantec Email Proxy" error and It says "Your email message to [list of recipients here] with the subject of [suject here] was unable to be sent because the connection to your mail server was interrupted.  Please open your email client and re-send the message from the Sent Messages folder."  This is the same message I was getting (and others here) were getting when trying to send to a longer list of recipients.

    We are all running Endpoint Protection v11.0.4000.2295.


  • 6.  RE: How do I prevent Endpoint Protection from blocking outbound emails to large groups of people?

    Posted Mar 11, 2010 06:47 PM
    The error message is a "Symantec Email Proxy" error and It says "Your email message to [list of recipients here] with the subject of [suject here] was unable to be sent because the connection to your mail server was interrupted.  Please open your email client and re-send the message from the Sent Messages folder."  This message only happens when sending to a longer lists of recipients (e.g. 20 or so), but not when sending to just a handful of recipients or less.


  • 7.  RE: How do I prevent Endpoint Protection from blocking outbound emails to large groups of people?

    Posted Mar 11, 2010 06:48 PM
    We seem to have a newer version: Endpoint Protection v11.0.4000.2295


  • 8.  RE: How do I prevent Endpoint Protection from blocking outbound emails to large groups of people?
    Best Answer

    Posted Mar 11, 2010 11:27 PM
    this was fixed in MU5 thats the latest version.seems like it was bug in your version
    http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2007121216360648
    you are running on MR4, can you try this on one machine before we upgrade all the box
    go to https://fileconnect.symantec.com
    put serial number
    download MU5
    open CD1
    install SEP
    try sending mails , if it works we shall upgrade all box to MU5 


  • 9.  RE: How do I prevent Endpoint Protection from blocking outbound emails to large groups of people?

    Posted Mar 19, 2010 11:46 AM
    This worked.  Thank you!