* Christoph Kuhle (Expat Email Ltd) <[email protected]> [090826 18:02]:
> I am registered with barracuda, but I had heard before that barracuda can
> reject a fair number of genuine emails (I never remember if that is a false
nope, for me the false positive rate of uceprotect was more.
> negative or a false positive!). If I include barracuda as well, is there a
> way to monitor what they have rejected, or must we wait for people to tell
> us that email is not getting through.
i have a perl script which analyses daily logs to produce o/p like,
ALLOWED Mails = 2487
BLOCKED No RDNS entry = 11367
Mailbox does not exists = 829
Listed in RBL
zen.spamhaus.org = 1133
dyna.spamrats.com = 202
uceprotect.local = 8489
b.barracudacentral.org = 4258
> Separately, I do notice a small but sufficiently significant number of
> genuine emails which get rejected with no reverse DNS. Should we be happy
> to put email addresses on the white list, or is that dangerous with Spammers
every mailserver (or smarthost) *should* have an rdns entry. see above
to find how many spam are rejected with missing rdns switch.
> being able to get through if they purport to be that address? Up to now, we
> have just passed on the maillog entry on so that they can check it out with
> their own hosting company.
we also do same thing.
>
> Is it an easy script that we can run to see the percentages being rejected
> by the various stages? The one I have is:
> cat /usr/local/psa/var/log/maillog | /etc/spamdyke-statistics.pl
simple it can be as easy,
cat logfile | egrep -c 'FILTER_RBL_MATCH.*zen.spamhaus.org'
cat logfile | egrep -c 'FILTER_RDNS_MISSING'
or it can be anything similar in awk/perl/python/etc.
Shantanu
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