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A comment on SPF, DMARC, and DKIM: How to Keep Your Email Out of the Spam Folder. Parent comment

Re:SPF, DMARC, and DKIM: How to Keep Your Email Out of the S... by ryandonsullivan on Tuesday June 21, 2016 @12:36PM (#11947011)
That's a totally fair point. I'm not entirely sure why most third parties are still using ~ in their documentation but it still seems to be the norm. I do like the definitive nature of -all.
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Re:SPF, DMARC, and DKIM: How to Keep Your Email Out of the S... by aroch on Tuesday June 21, 2016 @01:39PM (#11947650)
IIRC ~all is the recommendation because hotmail/live told people to use ~all to prevent hardfails when hotmail's lookups timed out or if a particular mailserver IP was inaccessible during spam checks.

~all will result in your email being bounced around until accepted even if the IP doesn't match DNS records (more or less).

-all will result in hardfail if rejected by any TO mailserver.

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