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For your last point, check https://toolbox.googleapps.com/apps/checkmx/check https://toolbox.googleapps.com/apps/checkmx/check. Chances are, google doesn't like
by dorfsmay 6y ago
For your last point, check https://toolbox.googleapps.com/apps/checkmx/check https://toolbox.googleapps.com/apps/checkmx/check. Chances are, google doesn't like your DNS server answers to its ANY requests, regardless for them complying to the RFCs.