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A comment on Show HN: SESS – Simple Email Sending Service. Parent comment

Re:Show HN: SESS – Simple Email Sending Service by conquistadog on Saturday July 14, 2018 @05:55PM (#17532602)
How does the existence of a catch-all, of any kind, make it not a "valid business domain?"
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Re:Show HN: SESS – Simple Email Sending Service by massaman_yams on Saturday July 14, 2018 @09:42PM (#17533388)
I'm not commenting on whether it's a good heuristic or not. Just a possible approach.
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