Re: [exim] problem with certain DNS lookups for NS records

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Autor: Giuliano Gavazzi
Datum:  
To: exim-users
Betreff: Re: [exim] problem with certain DNS lookups for NS records

On 6 Feb 2006, at 13:34, Philip Hazel wrote:

> The reason for the existence of dns_check_names_pattern is that some
> resolvers give (gave?) temporary errors instead of "no such record"
> when
> presented with a name containing "strange" characters. There shouldn't
> actually be a need for dns_check_names_pattern.


this is enough for me to put
dns_check_names_pattern =
as my resolver (tested with dig)
returns NXDOMAIN. I am not sure this will be a guarantee of any sort,
as the temporary
error might sneak in from another server if the character is legal
but does confuse the target
server.
Atch, I though I would test this against microsoft so I typed:

dig p/d.microstoft.com
;; QUESTION SECTION:
;p/d.microstoft.com.            IN      A


;; ANSWER SECTION:
p/d.microstoft.com.     3600    IN      A       64.49.213.238


what the...? (you'll find that it's just a wildcard record.)

With dns_check_names_pattern my ACL works as expected. Now it's just
a question of
waiting for some more spam to get that far...

g