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ipv6

Gmail blocking servers that don’t have a Valid IPv6 PTR Record

May 13, 2016 / neilzensoftware / 1 Comment


Gmail-block-ipv6I wanted to share an issue we’ve seen multiple reports of this week, where MDaemon customers have started receiving bouncebacks from Google mail servers.

Valid email is being refused due to PTR record failures, and it’s happening for all Gmail domains including customer registered domains that are used with Google services.
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