RE: Blocking personal email

From: James B. Lawton (jblii@attbi.com)
Date: 11/29/02

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    From: "James B. Lawton" <jblii@attbi.com>
To: <security-basics@securityfocus.com>
Date: Fri, 29 Nov 2002 12:40:04 -0500

    There are definitely solutions other than blocking Hotmail, Yahoo Mail,
    etc. Nee cee mentions MIMEsweeper; more accurately he should have said
    WEBsweeper.
    http://www.us.mimesweeper.com/products/msw/websweeper/default.asp This
    is an HTTP proxy that supports 3rd party AV products including most of
    the major vendors. We've been using it for about 6 months and it works
    fine, although it has taken some fine-tuning and there is a minor
    performance decrease on the client end. Scalability of this type of
    solution can be an issue if your organization is very large, or if you
    have multiple Internet access points. (We are about 1200 desktops) and
    have 2 Internet access points.

    There are other gateway products that support antivirus scanning. I
    believe Symantec has one that is quite good.

    JBLII

    -----Original Message-----
    From: nee cee [mailto:nc@phat.co.nz]
    Sent: Thursday, November 28, 2002 6:00 PM
    To: security-basics@securityfocus.com
    Cc: iceburn@dangerzone.com
    Subject: Re: Blocking personal email

    With regards to the outlook mail you could perhaps look at a commercial
    content scanning products (there is probably open source around) like
    MailMarshall, Mail Essentials or MimeSweeper. I use the first one with a
    comand line virus scanner and have not had an email virus since i
    installed it. You may need to change email policies if blocking someones
    existing access.

            

    "Tim V - DZ " <iceburn@dangerzone.com>
    28/11/2002 02:52 AM

    Subject: Blocking personal email

    In a company using the exchange / outlook combination is there any way
    to block users from using outlook to receive non-exchange mail? We are
    concerned about people adding their personal email to the Outlook
    accounts and subsequently being exposed to more viruses. The mail that
    goes through exchange is guaranteed to be scanned before it's viewed. I
    know that POP3 and SMTP can be blocked by ports, but what about services
    like HOTMAIL where outlook can use HTTP to retrieve mail? Is the only
    solution to block that site (making it so users can't see any hotmail
    pages in the browser either)?

    Thanks,

    -tim

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