SMTP queue in Exchange continues to grow

Posted on 2006-06-08
Last Modified: 2011-10-03
I can email out just fine, but nothing from the outside is getting in.  My SMTP queue is up to 2900 and rising.  I am in clustered mode on Exchange 2003.  WHat do I do to fix it.  I need help asap!
Question by:HunTelWebProgrammer
    LVL 1

    Author Comment

    One thing to note, the folder EXCHSRVR\Mailroot\vsi 1\Queue has like no more than 6 files in it, but the monitoring service is what keeps saying 2900 and growing.
    LVL 23

    Accepted Solution

    Check here:

    In most cases, a buildup of messages in the Local Delivery queue indicates a performance issue or outages on the server, because the server can no longer deliver the incoming mail in a timely manner. This hold up can come from slowness in consulting Active Directory or in handing messages off for local delivery or SMTP. It can also come from databases being dismounted.

    A rise in the remote queue length means that mail is not being sent to other servers. This failure to send mail can be explained by outages or performance issues with the network or remote servers. Those outages or performance issues are causing the network or remote servers from receiving the mail efficiently.

    Which specific queue are you referring to?
    LVL 18

    Expert Comment

    by:Sam Panwar
    It's possible that the junk messages that are being sent out now were already in the SMTP queue on the server prior to your cleaning up the viruses that produced them. You can determine whether this is the case or
    not by using the Exchange System Manager and navigating through the Administrative Groups to the Protocols / SMTP section of your server. If there are a bunch of messages in the queue to odd addresses then delete
    them. If the problem goes away, you're done.

    Another thought is that you didn't get all of the viruses out of the system. You can determine if this is the case by taking the server off the network (both internal and external connections if you have both), turning on the
    SMTP service and watching the SMTP queue - if it continues to grow, the problem is on your server. If not then the problem is somewhere else.

    The other places the messages might be coming from are from one or more workstations on your network or from the outside world. The internal workstations may be infected, in which case you have the fun of rooting that
    problem out and correcting it.

    Exchange  isn't open to outside mail relay by default, but if you've changed the SMTP routing characteristics of the server in any way then you may have opened the server up to outside relaying.

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