Re: [exim] Exclude host from sender verification

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著者: Renaud Allard
日付:  
To: Mike Brudenell, Exim Users
題目: Re: [exim] Exclude host from sender verification


On 05/26/2016 04:21 PM, Renaud Allard wrote:
>
>
> On 05/26/2016 04:14 PM, Mike Brudenell wrote:
>> A head's up to all…
>>
>> It looks like Google might be tightening up their message receiving
>> checks. Renaud's message went into my Spam folder at Google, with the
>> explanatory reason:
>>
>>     *Why is this message in Spam?* It has a from address in allard.it
>>     <http://allard.it> but has failed allard.it <http://allard.it>'s
>>     required tests for authentication.  Learn more
>>     <https://support.google.com/mail/answer/1366858?hl=en-GB&expand=5>

>>
>>
>> In particular:
>>
>>   * the DKIM signature failed to verify: "dkim=neutral (body hash did
>>     not verify) header.i=@allard.it <http://allard.it>;"
>>   * the SPF check from the envelope's RFC5321.MailFrom "@exim.org
>>     <http://exim.org>" address gave a /neutral/ result _but_ its domain
>>     isn't in alignment with the "allard.it <http://allard.it>" in the
>>     RFC5322.From address, which is a problem because…
>>   * allard.it <http://allard.it> publish a DMARC record saying messages
>>     that fail both DKIM and SPF checks should be rejected: "v=DMARC1\;
>>     p=reject\; sp=reject\; pct=100\;" (DMARC requires the underlying SPF
>>     test to pass _and_ the domains of the RFC5321.MailFrom and
>>     RFC5322.From addresses to be in alignment)

>>
>> I know people have been expecting this to become a problem and it
>> appears to be here now. I suspect the Exim list's service needs to adapt
>> to work in the brave new world…
>>
>
> Or more likely, google has/had a temporary problem with DKIM. I just
> sent a mail to a gmail address without any issue.
>
> Authentication-Results: mx.google.com;
>        dkim=pass header.i=@allard.it;
>        spf=pass (google.com: domain of prvs=0954675674=renaud@???
> designates 91.183.56.64 as permitted sender)
> smtp.mailfrom=prvs=0954675674=renaud@???;
>        dmarc=pass (p=REJECT dis=NONE) header.from=allard.it

>
>
>


Sorry, I didn't read it fully. That's because the mail you received is
resent from the mailing list and claims to be from me directly.
Normally, there is a parameter in mailman which allows to rewrite the
addresses with a strict DMARC policy so that the messages don't get blocked.