[Info-vax] What is the correct way to contact VSI?

[Simon Clubley]

On 2019-11-25, Phillip Helbig (undress to reply) <helbig at asclothestro.multivax.de> wrote:
> In article <qrh5sh$81s$1 at dont-email.me>, Simon Clubley
><clubley at remove_me.eisner.decus.org-Earth.UFP> writes: 
>
>> >> I notice that if checking "theberrymans.com" on an online blacklist
>> >> service, it gets hits in 4 lists. Dont know if it is significant...
>> >
>> > Probably.  Be happy they didn't drop the SMTP connection, preventing the 
>> > email from being delivered at all.
>> >
>> 
>> No, dropping the connection with a reject status is _exactly_ what
>> should have happened, especially if it was a blacklisting issue,
>> so that Mark would have been told immediately his email had not been
>> delivered instead of him having to wonder if anyone at VSI was ever
>> going to get back to him.
>
> In the old days, one could do that.  These days, that reaction can be, 
> and is, intentionally provoked with a faked sender in order to produce 
> backscatter spam.  So, to avoid spam, many people just drop the 
> connection with no message if it comes from an address in an RBL.
>

Dropping the SMTP connection results in a reject status being sent
by the receiver at connection level. The receiver does not construct
a new email message and send it to a possibly faked sender.

Have a look at how the later versions of TCP/IP Services handles RBL
blacklists for example. The email is rejected during receive with a
rejected error status. TCP/IP Services does _not_ construct a new
email and send it to a possibly faked sender.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.