RE: [cobalt-users] Neomail - modify domain name for the from fiel d

["Jolley, Carl" <Carl.Jolley@xxxxxxx>]

-----Original Message-----
From: cobaltusers 
Sent: Wednesday, July 17, 2002 7:59 PM
To: cobalt-users@xxxxxxxxxxxxxxx
Subject: RE: [cobalt-users] Neomail - modify domain name for the from
field


I checked the build file for my Raq4i and it shows 3100R
so based on that information I was thinking that the information
Taco's script in the neomail_prefs.pl would be using the following section:

<snip>
 elsif ($BUILD =~ /3001R/ || $BUILD =~ /3100R/) {
    $VIRTUSERTABLE="/etc/mail/virtusertable";
</snip>
which if I'm understanding this correctly would use this
<snip>
if ($VIRTUSERTABLE ne "") {
    my $SITEHOSTNAME=$ENV{HTTP_HOST};
    if ($SITEHOSTNAME =~ /^([-\@\w.]+)$/) {
        $SITEHOSTNAME = $1;                     # $data now untainted
</snip>

Could you add an elseif ($SITEHOSTNAME =~ "this is the part I have no idea
about"
with some kind of regular expression (I hope that is what this is
"/^([-\@\w.]+)$/")
to remove the my. from the domain?

Is this possible or is my guessing and fumbling just way off?
---------------------------------

The /^([-\@\w.]+)$/ is a perl regular expression which is checking
for all the characters that might appear in a hostname, i.e. the 
[] construct is a character class and the '+' that follows it
says "one or more". Included in the character class are the -
character, the @ character, all alphanumeric characters and the
. (dot) character. The \w sequence says "all aphpanumeric characters".
The test is only slightly incorrect since the \w sequence also
includes the underscore character which, if my memory serves me,
is NOT a valid character in a hostname. If i'm correct about
the underscore then the \w sequence should be replaced by
the string A-Za-z0-9 to be strictly correct. Actually the
checking of the hostname is intended to do something called
"un-tainting" but that is a slightly more advanced concept than
"checking  all of the characters of the hostname". Note also
that this check doesn't validate the form of a hostname at all,
based soley on the regex, the string "@--.-.@" would be considerted a
valid hostname. It does include only the correct characters but that
alone doesn't mean that it is a valid hostname.