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Re: [ietf-smtp] DSNs

2020-04-18 16:07:32
In article <29104A0F-B9ED-4CD7-99B3-5A042375C68B(_at_)dukhovni(_dot_)org>,
Viktor Dukhovni  <ietf-smtp(_at_)ietf(_dot_)org> wrote:
On Apr 10, 2020, at 5:04 AM, Claus Assmann <ietf-smtp(_at_)esmtp(_dot_)org> 
wrote:

On Thu, Apr 09, 2020, John R Levine wrote:

Oh, RFC 3461.  Agreed, it's basically an SMTP level web bug.  Nobody
implements that.

sendmail implemented it too (more than 20 years ago?). I guess it
should read "nobody enables/uses it"?

And likewise Postfix also implements RFC3461.  It is on by default.
I turn it off on inbound edge systems, and ignore remote "DSN" on
outbound edge systems.  That way, any DSNs are sent within either my
or the remote ADMD, but not across ADMD boundaries. ...

I meant that nobody sends positive DSNs.  You're right, we get lots of DSN 
bounces.

R's,
John


-- 
Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Primary Perpetrator of "The Internet 
for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly

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