Exchange sends to some domains but not others

Posted on 2006-05-29
Last Modified: 2010-08-05
my exchange seems to send mail to some domains but not others.  the emails it doesnt send to it just sits in the queues.
cant see whats wrong.

i recently set up this exchange and followed all the relay articles to make the exchange more secure.  i had alot of spam relaying thru at inital setup.  everything worked great for a while now ive found its holding back some mail.

please help

Question by:rick81
    LVL 104

    Accepted Solution

    Standard tests...
    Go to and enter your domain. See if it throws back an errors.
    Go to and enter both your domain name and your external IP address. See if you are listed on any blacklists.

    If you are on a DSL connection, then you may have problems sending to certain domains and will need to use an SMTP Connector to route email via your ISP.

    Otherwise what to the NDRs say? Not the delay messages, but the fatal failure.

    LVL 6

    Author Comment

    OK -
    dnsreport threw back some failures under dns.  mail test was ok
    errors were
    -Open DNS servers
    -Missing (stealth) nameservers
    -Stealth NS record leakage

    i recieved this under the RBL test (does this mean im on their blacklists)

    Name URL RBL-base result comments LISTED  
    DSBL - Distributed Sender Boycott List/list LISTED  
    DSBL - Distributed Sender Boycott List/unconfirmed LISTED LISTED  
    ORDB - the Open Relay DataBase LISTED ? LISTED

    I am on a DSL connection and have an smtp connector which points to my server

    Havent really recieved any NDR failures.  one re: smtp connnector issue 554 or something and some delays.

    what  next?

    LVL 6

    Author Comment

    all the rest of the RBL's were OK or TIMEDOUT
    LVL 104

    Expert Comment

    You are listed in blacklists, which will cause problems with email delivery.
    Your SMTP Connector should be either configured to look at a smart host which should be your ISPs server, or configured to use DNS.
    You will need to look at each blacklist to see how to get yourself removed.

    LVL 6

    Author Comment

    i have gone thru the blacklists and tried to remove myself.  guess ill have to see if ok.
    can u talk me thru checking the smtp connector?
    LVL 6

    Author Comment

    i've figured it out dont worry

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