On Fri, 28 Sep 2012, Federico Leva (Nemo) wrote:
Eventually we'll probably bump "?all" to a stricter "~all" aka SoftFail, which tells the receiving side that only mail coming from the listed subnets is valid. Most ISPs will route 'other' mail to a spam folder based on SoftFail.
I guess this means that people will no longer be able to successfully use a @wikimedia.org address in their from: field unless they are WMF employees (or whatever) and use the Google Apps address via webmail or SMTP-AUTH? Not that I care, but all such existing users should probably be warned.
This is why Andrew in Office IT sent out emails over the past couple of weeks regarding mail client setup. I don't think he's heard from anyone who for whom this is an issue, but he's on board for helping people adjust their outbound mailserver if we can find anyone who needs to.
I was under the impression that ~all softfail is not an assertion that something is not authorized and the only way to actually assert that is with -all hardfail.
Please bug me with any questions/comments!
Nemo
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