Setting the right SPF records / 2021-11-20

2021-11-20 Setting the right SPF records
In debugging mail from the shell server I noticed something in the headers:
Authentication-Results: xs4all.nl; spf=none smtp.mailfrom=gosper.idefix.net;
        dkim=pass header.d=idefix.net; dmarc=pass header.from=idefix.net
The shell server sees itself as gosper.idefix.net and uses this on locally generated outgoing mail. I only had an SPF record for idefix.net so setting one up for gosper.idefix.net too can help fix things. I also need a DMARC policy allowing mail from subdomains of idefix.net, with more specific DMARC policies for active subdomains.

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IPv6 check

Running test...
, reachable as koos+website@idefix.net. PGP encrypted e-mail preferred. PGP key 5BA9 368B E6F3 34E4 local copy PGP key 5BA9 368B E6F3 34E4 via keyservers

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