Re: DNS blacklists

[Dexter Caldwell <Dexter.Caldwell () FURMAN EDU>]

I apologize for spamming the rest of you with this message.  My mistake.

D/C
The EDUCAUSE Security Constituent Group Listserv
<SECURITY () LISTSERV EDUCAUSE EDU> writes:
> Mike:
> � � � � � � � � I'm responding off-list. � � � We at one point had a
> problem with blacklists because they were blocking legitimate mail.
> � Since you have almost no control over contacting the blacklist managers
> and getting anything done we either had to stop using them or adjust or
> settings. � One spam blocklist we like is zen.spamhaus.org. � We also use
> the barracuda list. � With the barracudas, we've told it to quaratine on
> any message coming from the zen.spamhaus.org � blacklist, that way it
> never makes it to the inbox unless the user delivers it manually. � You
> might consider this approach. � I know our most vocal users against the
> false-positives were the folks who raise money for the campus so it might
> be a way you can continue to use the list and keep a reasonable level of
> protection. � My problem was that the lists got so bad at one point that
> I couldn't trust them myself and I moved to this model a year or so.
> � Training yoru bayesian databases a littler better also can help.
>
> Dexter Caldwell
> Information Security Administrator
> Computing & Information Services
> Furman University
> 3300 Poinsett Hwy
> Greenville, SC 29613
> email: [ mailto:dexter.caldwell () furman edu ]dexter.caldwell () furman edu
> office: 864-294-3566
> facsimile: 864-294.3001
>
> The EDUCAUSE Security Constituent Group Listserv <[
> mailto:SECURITY () LISTSERV EDUCAUSE EDU ]SECURITY () LISTSERV EDUCAUSE EDU>
> writes:
> Hi,
> � 
> I was just curious what other campus’ are using in terms of DNS
> blacklist when it comes to email? They are very handy but recently a few
> of them have been the source of some complaints from our users. Currently
> we are using:
> � 
> Rbl-xbl.Spamhaus
> psbl.surriel.com
> cbl.abuseat.org
> bl.spamcop.net
> dnsbl.njabl.org
> Barracudacentral – by default in our barracuda device
> � 
> I know we are probably using more lists than is necessary, but I’m sure
> you all know how cranky people can get if they find a single spam message
> in their inbox.
> � 
> Mike Tupker
> Systems Administrator
> Mount Mercy College
> � 
> �