Re: (newbie) sendmail Masquerading Help?

From: Nifty Hat Mitch (mitch48_at_sbcglobal.net)
Date: 08/18/04

  • Next message: Kevin Wang: "Re: Unable to Play MP3 & .DAT File on FEDORA Core 1." 
    Date: Wed, 18 Aug 2004 10:58:29 -0700
To: For users of Fedora Core releases <fedora-list@redhat.com>

    On Sat, Aug 14, 2004 at 03:15:36PM -0400, Jorge Luis wrote:
    > >>>>> "Harry" == Harry Putnam <reader@newsguy.com> writes:
    >
    > Harry> Again it sounds as if the problem is solved... is that the
    > Harry> case?
    >
    > Yes, it seems to be working fine with:
    >
    > MASQUERADE_AS(`jorge.cc')dnl
    > FEATURE(masquerade_envelope)dnl
    > FEATURE(masquerade_entire_domain)dnl
    >
    > Thanks to you and to Alexander for the assistance.

    Since it is working do not change things!

    I watched this and I suspect that a more productive
    thought process would have been authentication and a
    smart host.

    Various ISP's and mail hosts are validating the
    host name and the address. This can be very hard
    to do on DHCP+dynamicDNS hosts.

    Some hosts will do a forward or reverse lookup and toss you
    as you can for them.

     dnl FEATURE(`accept_unresolvable_domains')dnl

    Some hosts will notice that you are connecting from a dialup/dhcp
    address range and reject you as possibly open relay or virus infected
    host. Most large companies have turned on most of the rejection knobs
    because of spam via open relays and viruses.

    MASQUERADE_AS.... has a strong place for incoming mail. It also has a
    strong place for outcoming mail when you want to 'hide' the internal
    hosts (rewrite headers) that cannot be connected to from outside.
    Rewriting headers can cause mail replies to be delivered to a central
    host for spam filtering and virus scanning.

    I suspect that authentication and delivery via smart host will be the
    most common thing folks need now and in the coming 18 months. 

    -- 
	T o m  M i t c h e l l 
	Just say no to 74LS73 in 2004
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