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From: Ralf Hildebrandt (news-list.postfix.usersinnominate.de)
Date: Thu Jan 04 2001 - 10:43:22 CST

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    On 4 Jan 2001 17:24:57 +0100, J.D. Bronson <jeffsparc-central.com> wrote:

    >the spam is not sent FROM msn.com's machine but a person with a
    >"From:userheremsn.com" address.

    Header or envelope from. Anyway, both can be forged at will...

    >I want to BLOCK any email with a FROM:*msn.com from reaching my machine.

    header_check = regexp:/etc/postfix/header_check.regexp

    and in /etc/postfix/header_check.regexp:

    /^From:.*msn.com$/ REJECT 

    -- 
ralf.hildebrandtinnominate.com
System Engineer                                            innominate AG
Diplom-Informatiker             the linux architects - alive and kicking
tel: +49.30.308806-62  fax: -698                      www.innominate.com