Mailing List Archive: Questionable DSNs

Questionable DSNs

Apr 7, 2008, 9:00 AM

Post #1 of 3 (2983 views)

On Mon, 7 Apr 2008, Alessandro Vesely wrote:

> Frank Ellermann wrote:
> > Stuart D. Gathman wrote:
> >> I was considering posting an auto-note to postmaster in case
> >> of PermError in addition to a DSN, but PermError from macros
> >> would discourage that.
>
> While the DSN is questionable as usual, an auto-note to postmaster in
> case of PermError should trigger the desired effect.

The scenario is that the SPF result is PermError, but various heuristics
have determined that the mail should be accepted. For example,
a mechanism of A:1.2.3.4 results in a "bestguess" result of "pass"
when coming from 1.2.3.4. In these cases, the sender still needs to
fix their SPF record - so I send a DSN while accepting the email.

But the end user never reads the DSN, often interpreting it as a rejection,
hence the idea to send something to postmaster instead.

--
Stuart D. Gathman <stuart@bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.

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Re: Questionable DSNs [ In reply to ]

vesely at tana

Apr 7, 2008, 11:09 PM

Post #2 of 3 (2849 views)

Permalink

Stuart D. Gathman wrote:
>> >> I was considering posting an auto-note to postmaster in case
>> >> of PermError in addition to a DSN, but PermError from macros
>> >> would discourage that.
>>
>> While the DSN is questionable as usual, an auto-note to postmaster in
>> case of PermError should trigger the desired effect.
>
> But the end user never reads the DSN, often interpreting it as a rejection,
> hence the idea to send something to postmaster instead.

IMHO sending to postmaster is more reliable an probably more likely to
achieve the desired effect of having a PermError corrected.

Do you still use DSN format? It may make sense to try and standardize
the format and the circumstances where such notes may be issued, so
that postmasters may process automatically some of that.

Would it make sense to cache a domain-name+spf-record-content key, in
order to avoid sending the same note note than once?

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Re: Questionable DSNs [ In reply to ]

stuart at bmsi

Apr 8, 2008, 8:11 PM

Post #3 of 3 (2845 views)

Permalink

On Tue, 8 Apr 2008, Alessandro Vesely wrote:

> Would it make sense to cache a domain-name+spf-record-content key, in
> order to avoid sending the same note note than once?

Already do that. Repeats every month by default. (Nag)

--
Stuart D. Gathman <stuart@bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.

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