> Matus UHLAR - fantomas writes:
>> This way spam filter will have to do SPF check for all mail delivered  
>> through backup
>> MX servers, since we don't SPF check on them...
>>
>> BTW, what happens with Old-Received-SPF headers when they exist already?

On 31.03.11 19:08, Sam Varshavchik wrote:
> They're left alone.
>
> The goal here is to certify that any "Received-SPF:" headers in the mail  
> were inserted by this host, and not somewhere else. Multiple 
> Received-SPF: headers are allowed. If any existing headers do not get 
> renamed, it would not be possible to reliably determine which ones are 
> authentic.

I'm fine with Received-SPF being renamed when mail is received from
untrusted host. But for mail received from our (trusted) mail backups:
- the SPF check will apparently fail (thus I better turn if off)
- I could trust the SPF headers made by them, but they get renamed to Old-

I think the SPF check done by courier doesn't care if the mail is received
from mail backup of recipient's domain. (This could be problem for multiple
recipients).


-- 
Matus UHLAR - fantomas, [email protected] ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
There's a long-standing bug relating to the x86 architecture that
allows you to install Windows.   -- Matthew D. Fuller

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