At the end of that, it asks about whether your server passes "the diagnostic tes... | Hacker News

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gknoy on July 8, 2015 | parent | context | favorite | on: Why does Gmail hate my domain?

At the end of that, it asks about whether your server passes "the diagnostic tests" -- but I didn't see a link to which tests it was talking about.

blfr on July 9, 2015 [–]

It's MXToolBox[1]. To be fair to OP, it's very popular.

[1] http://mxtoolbox.com/diagnostic.aspx

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