joe-jobbed, block 'undeliverable' messages?

am.lists am.lists at
Thu Apr 26 22:07:00 IST 2007

On 4/26/07, Chris Yuzik <itdept at> wrote:
> am.lists wrote:
> > Typically, these joe-jobs are from non-existing email addresses (e.g.
> > asdfasdf at victimdomain.tld). When the non-delivery report is
> > returned, it's attempted to be sent to that address, which doesn't
> > exist. If you were using Postfix, you could use
> > reject_unverified_recipient in the smtpd_recipient_restrictions
> > section of
> >
> > This way, you'd flat out reject any message to asdfasdf at the MTA,
> > keeping your MailScanner from never even seeing it.
> >
> > If you this might work for you (e.g. you are using Postfix) I can give
> > you more info about my particular setup (there's a little more to it
> > than that one line).
> Angelo,
> Thanks for the response, but unfortunately, this one was people's real
> email addresses (several of them) that were joe-jobbed. The web designer
> thought it would be a "good idea" to have a company directory and post
> everyone's email addresses for this domain on the company's website and
> did so in plain text using the <a
> href="mailto:dave at">dave at</a> format,
> without even attempting to obfuscate the links. He's been appropriately
> whipped by management.
> Thanks though.
> Chris

Wow, this should be a crime punishable by death.  I'm sorry to hear
that you have to deal with such a situation.

Looking back through, I think you're a sendmail guy anyway, and as the
other potentates say, Milter-null is a good solution.


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