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Date:      Mon, 1 Mar 2021 18:04:43 -0600
From:      Tim Daneliuk <tundra@tundraware.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: Totally OT comment: Re: Somewhat OT: Mail Relay Services
Message-ID:  <c3e9da7f-7796-e105-6792-fe19769df224@tundraware.com>
In-Reply-To: <5b1d0cdf-65c8-19bd-1d3f-0a3ff2922d1f@pinyon.org>
References:  <877d08ef-d533-69f6-4c44-f2cbbe39ba31@tundraware.com> <3926E240-2226-4E94-96E2-10A877B139D0@kicp.uchicago.edu> <3dac8dd5-7751-1823-3cfc-45172cd77b64@FreeBSD.org> <2edd9853-3af7-c0b8-7118-329d8af346be@kicp.uchicago.edu> <8dc26e45-355a-dadd-0309-02dda1da3d87@tundraware.com> <5b1d0cdf-65c8-19bd-1d3f-0a3ff2922d1f@pinyon.org>

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On 3/1/21 5:56 PM, Russell L. Carter wrote:
> nd I'm a little icked out to have to run local mail through yet
> another evilcorp.  So I'm provisionally going to have the local postfix
> instances SMTP relay to a cloud postfix instance I manage.  T


You don't.  Sendmail, at least, is smart enough to deliver local mail
without doing through the relay - at least for things in the same
domain.

For other domains, sendmail provides mailtable which is a way to decide
which relay should be used for which domains.  (I just confirmed this
with the sendmail gurus.)  I assume postfix has something analogous.

Also, I checked with DuoCircle and they claim to only retain the content
for a day in their logs, but are willing to turn that off at the request
of the customer.

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Tim Daneliuk     tundra@tundraware.com
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