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Mail Problem -> Diagnostic-Code: smtp; 451 4.4.1 [internal] No valid hosts (too many connection failures)

  • 1.  Mail Problem -> Diagnostic-Code: smtp; 451 4.4.1 [internal] No valid hosts (too many connection failures)

    Posted Nov 28, 2012 07:06 AM

     

    Hi, I have a problem that apparently is related to Symantec (i use symantec endpoint use v11).
     
    I have a user who repeatedly get invalid or delay delivery mails.
     
    The message is as follows:
     
    ==================================================
    X-Symantec-Messaging-Gateway-Queue-ID: E2/10-03370-59193B05
    X-Symantec-Messaging-Gateway-Sender: rfc822; user1@example.com
    Reporting-MTA: dns; mailsecurity.example2.com
    Arrival-Date: Tue, 27 Nov 2012 12:06:13 -0300
     
    Final-Recipient: rfc822; user2@example2
    Status: 4.4.1
    Action: delayed
    Last-Attempt-Date: Tue, 27 Nov 2012 12:06:13 -0300
    Diagnostic-Code: smtp; 451 4.4.1 [internal] No valid hosts (too many connection failures)
    ===================================================
     
    What might be happening?
     
    Thanks!

     



  • 2.  RE: Mail Problem -> Diagnostic-Code: smtp; 451 4.4.1 [internal] No valid hosts (too many connection failures)

    Posted Nov 28, 2012 07:17 AM

    Hi,

    Check this artical

    Queue message: 451 4.4.1 [internal] No valid hosts (too many connection failures)

    http://www.symantec.com/business/support/index?page=content&id=TECH94659

    Check this thread

    https://www-secure.symantec.com/connect/forums/451-441-internal-no-valid-hosts-unable-make-any-connections