cut off by spamhaus free use?

[Jeff Mills]

> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info 
> [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf 
> Of Jeff A. Earickson
> Sent: Monday, 3 December 2007 8:45 AM
> To: mailscanner mailing list
> Subject: OT: cut off by spamhaus free use?
> 
> Gang,
> 
> Has anybody ever had SpamHaus cut off the free use of DNSBL 
> for your site?  All of our inbound email started getting this:
> 
> reject=451 4.4.3 Temporary lookup failure of [IP number] at 
> zen.spamhaus.org
> 
> on Saturday morning.  I removed Zen usage from my sendmail 
> config and my email started flowing in again.  I looked at 
> their usage page 
> (http://www.spamhaus.org/organization/dnsblusage.html)
> and believe I meet their qualifications (I use caching DNS on 
> our sendmail box too).  But maybe they disagree; I haven't heard back.
> 
> Anybody else ever had the rug pulled out from under their email?

Yes it happened to one of my installs. Unfortunately, somebody had used
their domain name in a spam attack, so the server got thousands of extra
inbound emails. It was enough for spamhaus to block the servers.