Re: [exim] Callouts, NULL DSN

Startseite
Nachricht löschen
Nachricht beantworten
Autor: Dave Lugo
Datum:  
To: exim-users
Betreff: Re: [exim] Callouts, NULL DSN
On Sat, 20 Aug 2005, Steve B wrote:
>
> Well, I've got a problem with an SMTP server refusing a null DSN.
> Apparently this guy John Levine (iecc.com) refuses any connects with a
> MAIL FROM: <> and thus callout verification fails.
>


Eh... I suspect your statement "refuses any connects with a MAIL FROM: <>"
is not entirely accurate.

> We've sent a number of mails back and forth, and it boils down to me
> arguing "RFC XXX, RFC XXX, RFC XXX says you MUST accept this. Sendmail,
> the largest producer of SMTP software in the world says you must accept
> this"
>


If he never sent the original item that resulted in the bounce,
WHY would he want to accept the blowback that the bounce represents?

> Then he point off to his own failed attempt at an RFC (BATV ,
> draft-levine-mass-batv-01.txt ) and says that says it is okay, and what
> we are doing it wrong.
>


'Scuse me? Failed attempt? BATV works great, or at least the
customers I have that have enabled it are very happy with it.


> Any insights?
>


My understanding is that due to the massive forgery of John's
domains, he's SWAMPED with callback verifications. To him,
they can be accurately described as a DoS he never asked for.

-- 
--------------------------------------------------------
Dave Lugo   dlugo@???    LC Unit #260   TINLC
Have you hugged your firewall today?   No spam, thanks.
--------------------------------------------------------
Are you the police?  . . . .  No ma'am, we're sysadmins.