On Tue, 2017-10-17 at 16:20 -0700, Mark Sapiro wrote:
> See my post that I was still typing when this was sent
> <https://mail.python.org/pipermail/mailman-users/2017-October/082621.
> html>.

> 2) It must pass SPF. SPF works on the domain of the SMTP envelope from.
> Thus for SPF to pass, that domain must publish an SPF record specifying
> the IP of the sending server as a permitted sender. Further, for DMARC
> the envelope from (SPF) domain must align with the From: domain. Again,
> in strict mode aligned means equal. In relaxed mode aligned means the
> corresponding organizational domains are equal.

OK, thanks. This is clear, and useful information. fmp.com publishes a
proper SPF record, and with regard to the mail server DMARC mitigation
program I wrote for Courier, the envelope sender is "al...@fmp.com",
which can possibly be adjusted, but which matches "postmas...@fmp.com"
which I'm using for the body From header on munged emails, and on top
of this FMP publishes "a mx ptr ip4:198.58.125.221 mx:linode.fmp.com
-all" for SPF, which grabs just about everything and should be OK.

-- 
Lindsay Haisley       | "The first casualty when
FMP Computer Services |         war comes is truth."
512-259-1190          |            
http://www.fmp.com    |     -- Hiram W Johnson

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