On Tue, 20 Jan 2004, Gerardo Gregory wrote:
> Guees I got my hoemwork cut out for me, eh?
Yup :).
> Appreciate the RFC references. I have begun to notice though different
> usages of the same code by remote MTA's.
That's right. If you have a look at RFC 2821, you'll see:
---------
550 Requested action not taken: mailbox unavailable
(e.g., mailbox not found, no access, or command rejected
for policy reasons)
---------
Now note the one about policy reasons. This includes things like
Spam/Virus Denied, and probably a bunch of other things. Basically, the
problem(?) is that the code is generic enough to represent a wide range of
failures. This is both a strength and a weakness. It's a strength in
that if people need a new error code (like when implementing a spam
filter) they can just use that. But it's also a weakness in that parsing
results is a pain :). The RFC will give you the general description, but
your logs will give you the specifics. You'd probably want something like
(excuse my perl):
%errors = (
...
'550' => {
'Spam or virus' => [ '(spam|virus|whitelist)' ],
'User unknown' => [ '((recipient|user).*?unknown|mailbox.*?not found)'
],
...
}
)
then you'd use this pseudo-perl to eg. total the number of each different
type of message.
# Somewhere above we have a loop for the errors, which sets $errno and
# $errtext, and has a label NEXTERR
if($errno == 550) {
$errcoll = $errors{$errno};
foreach $type (keys %{ $errcoll } ) {
foreach $regex (@{ $errcoll->{$type} }) {
if($errtext =~ /$regex/) {
$types{$type}++;
next NEXTERR;
}
}
}
push @unknowns, $errtext;
}
Hope that helps.
:)
--
Tim Nelson
Systems Administrator
Sunet Internet
Tel:�+61 3 5241 1155
Fax: +61 3 5241 6187
Web: http://www.sunet.com.au/
Email: [EMAIL PROTECTED]
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