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  • 1.  421 4.4.0 [internal] no MXs for this domain could be reached at this time........

    Posted Mar 19, 2010 08:37 AM
    I have the SBG version 8.0.3-11 running on VmWare ESX4. Getting lots of error of this kind "421 4.4.0 [internal] no MXs for this domain could be reached at this time" and daily around 200-300 mails are stucking in the Delivery queue. Can anyone help me to resolve this issue...... Thanks in advace for the solution and efforts for this discussion..


  • 2.  RE: 421 4.4.0 [internal] no MXs for this domain could be reached at this time........

    Posted Mar 19, 2010 10:47 AM

    Are these mails to legitimate domains?  I am thinking may be these mails are NDRs (mail from MAILER-DAEMON) going out to bogus domains.

    Regards,

    Adnan


  • 3.  RE: 421 4.4.0 [internal] no MXs for this domain could be reached at this time........

    Broadcom Employee
    Posted Mar 19, 2010 11:20 AM
    Yeah, they are most likely NDRs we are trying to send to fake email addresses You should consider setting up an LDAP source so we will not accept messages for users that don't exist.


  • 4.  RE: 421 4.4.0 [internal] no MXs for this domain could be reached at this time........

    Posted Mar 24, 2010 04:53 AM

    No they are not the NDRs but they are the legitimate mails to legitimate domains.
    Domains like yahoo.com, icicibank.com, etc....


  • 5.  RE: 421 4.4.0 [internal] no MXs for this domain could be reached at this time........
    Best Answer

    Posted Mar 24, 2010 10:44 AM
    Hi Prashant,

    Please take a look at the following KB article for some suggestions:

    http://service1.symantec.com/SUPPORT/ent-gate.nsf/docid/2009032512563954

    Regards,

    Adnan