ExchSrvr sends and downloads same emails

Discussion in 'Windows Small Business Server' started by Ashwin @ Sumix, Nov 18, 2005.

  1. Hello All

    I have issue which is the following:

    in a nutshell, i have a catch all address, which is downloaded via my SBS
    POP3 connector, exchange distributes with no problems, however i have 5 users
    outside of my sbs network, so when a email lands in the catch all it gets
    filterd, if it is for those five users its get put into a seperate pop box
    for them.
    Internall i had enable forward emails with unresvolved host to: and use the
    ISP mail server, to send mail to those 5 clients, but my problem lies when a
    email is incorrectly addressed, it goes from :

    Catch all POP3 -> Exchange Server -> Forward with Unresolved Email Recp ->
    Send to ISP Mail server -> ISP mail server finds mail.xyz.com.au and delivers
    the mail there -> email then does not meet filtering requirements -> mail
    sits in pop3 catchall box and downloaded again -> cycle begins

    Detailed info
    Setup: My ISP has a catchall address for domain XYZ. In a POP3 Setup so
    anything @XYZ falls into the catchall pop3 account. It has 5 exceptions, this
    is for the users that are not part of the SBS Domain, so when a email comes
    to them the catchall filters them out and delivers it to their own pop3
    accounts. which they connect to and download.

    My Exchange Server use's a POP3 connector which connects to the pop3 account
    (lets call it ) and downloads the emails.
    Exchange then distrubutes those emails successfully.

    However, when a client on the LAN sends a email to a person who is not in
    the Domain (the 5 exceptions) it fails, since it can not find that user
    - which is correct because they are not listed in the AD.
    So in the Connector in the Exchange SYSTEM MANAGER -
    Server\Server\Protocols\SMTP\ virtual server, in the properties in MESSAGES,
    i have enabled Forward all mail with unresolved recipients to host - and use
    their ISP's DNS.

    What happens is when a email comes into the catch all that is incorrectly
    addressed, it uses the FORWARD fucntion, sends to the ISP, the ISP then
    delivers it to my Catchall Address again, and SBS then downloads the email
    Which can cause major greif if thre is more than 1 person on that header
    (TO, CC or BCC field)

    Is there any way I can stop this from happening.

    I have already setup on the SBS POP3 Conenctor to deliver failed mail to a
    user account as well.

    I have a major issue at the moment I do not how to fix this... is there any

    Regards Ash
    Ashwin @ Sumix, Nov 18, 2005
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  2. Ashwin @ Sumix

    Steve Guest

    You'd uncomplicate your life by moving to incoming mail via SMTP instead of
    Steve, Nov 18, 2005
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  3. Hello Steve

    Yes I know i would, but unforunately this is for a client of mine, who are
    very budget driven, I am doing this for free for them,

    I am asking for help.
    Ashwin @ Sumix, Nov 19, 2005
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