Re: Implementing on a sendmail mail hub

From: Loudermilk, Stephen <Stephen.Loudermilk_at_finra.org>
Date: Thu, 15 Oct 2015 20:11:37 +0000

Thank you. I believe that was likely our problem, having the submitting
app servers in the config file under ģInternalHostsē.

Steve Loudermilk
Technology Delivery Lead
Delivery Services Team
301-325-2525 (m)
Financial INdustry Regulatory Authority





On 10/15/15, 15:35, "Murray S. Kucherawy" <msk_at_blackops.org> wrote:

>On Thu, 15 Oct 2015, Loudermilk, Stephen wrote:
>> If messages are submitted directly on the sendmail host, it seems to be
>>fine
>> and this is what we see logged:
>>
>> Oct 15 10:46:21 sendmail[4135]: t9FEkL2A004135: milter=opendkim,
>> action=header, continue
>> Oct 15 10:46:21 sendmail[4135]: t9FEkL2A004135: milter=opendkim,
>>action=eoh,
>> continue
>> Oct 15 10:46:21 sendmail[4135]: t9FEkL2A004135: milter=opendkim,
>> action=body, continue
>> Oct 15 10:46:21 sendmail[4135]: t9FEkL2A004135: Milter insert (1):
>>header:
>> DKIM-Signature: v=1; a=rsa-sha256; c=relax
>> ed/simple;\n\td=domain.com;
>>s=ourselector;t=1444920381;\n\tbh=cSAyCJ9bvgBnxKQGW0S45Uk6zPQuGiGTWJbIEt8
>>eYPM=;\n\th=Date
>> :From
>>
>>:To:Subject;\n\tb=vuJhf0g0mR1Aijrc0hF444LebWi1kt1zJxYOlkJAp03RKRKc7AIQGH7
>>XX
>> WDYWSt1M\n\t EUfWwkaA/Q3GeolFZMqO82MSbHaHVUVG0EqzPwaXaQde
>> jhoIxMmeRQAxra1cW01bEF\n\t gFkKCZfUneRcrZZMWYIPc8JDJTqCfi6wd092PqfI=
>> Oct 15 10:46:21 sendmail[4135]: t9FEkL2A004135: Milter accept: message
>>
>> We?ve tried listing the originating servers in the opendkim
>>?TrustedHosts? file.
>> No change. Any help is greatly appreciated.
>
>The opendkim(8) explains how the signing/verifying decision is made. A
>web page version is available here:
>
>http://www.opendkim.org/opendkim.8.html#OPERATION
>
>The likely case is that your Windows machines are not identified as
>machines whose mail should be signed. The default is to sign only mail
>injected by localhost, since we're reasonably sure that's safe; it's
>impossible to assume any other safe default because we can't guess what
>your version of "internal host" means.
>
>You probably want to provide a list of safe IP address blocks, or a
>domain
>name, to InternalHosts.
>
>-MSK

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Received on Thu Oct 15 2015 - 20:11:56 PST

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