connection dropped by remote host

Posted on 2007-08-08
Last Modified: 2008-01-09
exchange 2003; recently changed our static IPs; our webhost also receives our emal and forwards to us.  Most outgoing email works fine, some does not, aol for instance. get the following error message: the connection was dropped by the remote host.
Question by:jimcjohnson
    LVL 29

    Expert Comment


    You might want to check your domain and IP's and see if they are on any blacklists. Also are you using a smarthost to forward mail through your ISP or are you using DNS? Can you make a connection to the AOL server via telnet and send mail?
    LVL 29

    Accepted Solution

    Sorry abother thought would be to check with the ISP that the reverse DNS for your IP address is up to date.
    LVL 17

    Expert Comment

    Please also visit and run the DNSReport test on your domain name. If you get any items highlighted in red, try to get these sorted out first.

    You may also wish to ad an spf record as well.

    Is there a specific error on the bounce back?
    LVL 23

    Assisted Solution

    by:Malli Boppe
    Can you paste the complete NDR.

    I would create aSMTp conenctor to with your ISP as the smart host so that you don't have any problem for the time being.
    LVL 104

    Expert Comment

    If you are receiving your email via your ISPs server and not directly then you should probably be using a smart host in Exchange to send outbound email through the same server.
    You should also ensure that the server has a name that resolves on the internet, has a matching reverse DNS and is announcing itself as the same name.
    Although if you have a static IP address is there any reason why you are not receiving email directly rather than forwarded from the ISP?

    LVL 1

    Expert Comment

    check your configuration of your cisco router or IDS. I doubt that might be the prob.

    Featured Post

    Too many email signature updates to deal with?

    Are you constantly visiting users’ desks making changes to email signatures? Feel like it’s taking up all of your time? Wish you could manage all signatures from one central location, easily design them and deploy them quickly to users? Well, there is an easy way!

    Join & Write a Comment

    We are happy to announce a brand new addition to our line of acclaimed email signature management products – CodeTwo Email Signatures for Office 365.
    Easy CSR creation in Exchange 2007,2010 and 2013
    In this video we show how to create an Accepted Domain in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Mail Flow >> Ac…
    how to add IIS SMTP to handle application/Scanner relays into office 365.

    754 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    20 Experts available now in Live!

    Get 1:1 Help Now