Re: [exim] Mail servers blocking DSN's

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Szerző: Renaud Allard
Dátum:  
Címzett: Stuart Gall
CC: Exim, Users, Peter Bowyer
Tárgy: Re: [exim] Mail servers blocking DSN's


Stuart Gall wrote:
> On 17 Oct 2006, at 23:57, Peter Bowyer wrote:
>
>>> I did come into such a problem. The resolution is quite simple, just
>>> contact the owner of these domains (IE: cc the postmaster of these
>>> domain when you send the evidence of their non compliance to
>>> rfc-ignorant.org) and ask them to correct their mail servers.
>>> For an example of a warning mail, you can look at
>>> http://www.rfc-ignorant.org/tools/detail.php?
>>> domain=asicorp.com&submitted=1161039519&table=dsn
>>> (yes, I do submit them automatically and there are many per day)
>> A side benefit of dsn.rfc-ignorant.org is that you can use that DNSBL
>> as a 'whitelist' to skip around your callouts, since you won't get any
>> useful information from calling out to domains that are listed there.
>
> I was trying to think of a way to use the RBL but since exim will
> cache the negative response (callout_domain_negative_expire) is it
> really worth it ?
>


You will always have cache time or delays anyway. Time for the admin of
rfc-ignorant to approve the listing, time of caching, time for dnsbl to
refresh,...

A way to _not_ do callouts for sites listed there is like this (to be
modified depending on your own config):

deny
!dnslists = dsn.rfc-ignorant.org/$sender_address_domain
!verify         = sender/callout=20s,defer_ok,random



> Stuart.


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